Here's the updated tale of the tape (which I initially posted last year under a different, non-registered, handle):
Accolades:
Olympic golds: Bekele 3, Kipchoge 2 (advantage Bekele)
Olympic medals: Bekele 4, Kipchoge 4 (tie)
World outdoor track championships: Bekele 5, Kipchoge 1 (advantage Bekele)
World indoor track championships: Bekele 1, Kipchoge 0 (advantage Bekele)
World cross country championships: Bekele 11, Kipchoge 0 (advantage Bekele)
Diamond and Golden League wins: Bekele 19, Kipchoge 5 (advantage Bekele)
World marathon majors wins: Bekele 2, Kipchoge 9 (advantage Kipchoge)
World records broken: Bekele 4, Kipchoge 1 (advantage Bekele)
Personal Bests:
1500 meters: Bekele 3:32.35, Kipchoge 3:33.20 (advantage Bekele)
3,000 meters: Bekele 7:25.79, Kipchoge 7:27.66 (advantage Bekele)
5,000 meters: Bekele 12:37.35, Kipchoge 12:46.53 (advantage Bekele)
10,000 meters: Bekele 26:17.53, Kipchoge 26:49.02 (advantage Bekele)
Half-Marathon: Bekele 1:00:22, Kipchoge 59:25 (advantage Kipchoge)
Marathon: Bekele 2:01:41, Kipchoge 2:01:39 (advantage Kipchoge)
Longevity:
Years in which they've won a global championship or world marathon major: Bekele 10, Kipchoge 9 (advantage Bekele)
Head to Head Races:
Bekele 14, Kipchoge 8 (advantage Bekele)
Add it all up, and Bekele has 12 advantages, and Kipchoge has only 3. Bekele has more Olympic golds, more outdoor and indoor track championships, more cross country championships, more Diamond and Golden league wins, more world records, and more years in which he's won a global championship or world marathon major. Bekele also has better times at 1500 meters, 3,000 meters, 5,000 meters, and 10,000 meters. Kipchoge's only advantages are more world marathon majors wins and better times at the half-marathon and marathon. Importantly, Bekele has the superior head to head record. The tape clearly favors Bekele.
But wait, there's more! We can also examine their variety of excellence and level of dominance.
Variety of Excellence:
Bekele has excelled on the track, grass, and roads. Kipchoge has been much better than Bekele on the roads in terms of victories, but Bekele nearly matched Kipchoge's Berlin marathon world record on the same course. Kipchoge has not come even close to Bekele's excellence in track or cross country in terms of times or championships. Advantage Bekele.
Level of Dominance:
While Kipchoge has absolutely dominated his competition in the marathon, Bekele did the same in cross country. One could argue Bekele's cross country wins were more impressive because the world cross country championship races he won were deeper, more competitive, and in tougher conditions than the big city marathons that comprise the majority of Kipchoge's wins. All of Kipchoge's world marathon major victories have come with the benefit of pacers, flat courses, and often ideal weather. Half of those wins came in the fall, when the world's best marathoners are split between New York, Chicago, and Berlin.
In contrast, Bekele routinely dominated an assemblage of elite milers, steeplechasers, 3k/5k specialists, and long distance guys in tough conditions on grueling courses designed to break the world's best runners. In 2004 alone, Bekele defeated the likes of Gebregziabher Gebremariam, Saif Saaeed Shaheen, Isaac Songok, Craig Mottram, Adil Kaouch, Dejene Berhanu, Alistair Cragg, Kevin Sullivan, Abraham Chebii, John Kibowen, and Nick Willis in the short race, and then came back the very next day to trounce runners such as Sileshi Sihine, Eliud Kipchoge himself, Charles Kamathi, Zersenay Tadese, Fabiano Joesph, John Korir, Abderrahim Goumri, and Bob Kennedy in the long race. Incredible!
When you consider the quality and depth of competition, the courses, the conditions, the national pride at stake, and the need to race on consecutive days, winning the double at the world cross country championships is an extraordinary achievement. For that reason, Bekele's quintuple-double at the world cross country championships may be the most impressive distance running accomplishment in history. Nobody else achieved the double even once, and Paul Tergat did not attempt it when he had the opportunity in 1998, 1999, or 2000. Abebe Bikila is comparable to Kipchoge in the marathon (two-time Olympic champion, world record holder who broke the previous record by an even greater margin than Kipchoge did, won a bunch of races, etc.). Nobody is comparable to Bekele in cross country.
Even if you want to give Kipchoge bonus points because "anything can go wrong in the marathon," it's reasonable to conclude that Bekele's dominance in cross country is at least equivalent to Kipchoge's dominance in the marathon. If so, then track becomes the tie-breaker for level of dominance, and we've already established that Bekele was much better on the track than Kipchoge. Advantage Bekele.
Conclusion/TLDR:
Bekele has the advantage over Kipchoge in accolades, personal bests, longevity, variety of excellence, and level of dominance.
So what can Kipchoge do to match or surpass Bekele for the title of greatest all-around distance runner of all time? I would suggest it's not run more marathons. Kipchoge has already established his all-time greatness on the roads. For Kipchoge to match Bekele's overall greatness on multiple surfaces and distances, Kipchoge needs to make up the glaring disparity in cross country and/or track accomplishments. First, Kipchoge needs to return to the track so he can break the world record in the 10,000 meters and/or win a gold medal in that event at the world championships in Eugene. Then he needs to go to Australia next February and win the 2023 world cross country championship, a title he has never won. Unless he does these things, Bekele will always have the advantage.