I believe Kiplimo is the more impressive 20yo and he does not get the credit he deserves. Let's start by listing each athletes notable performances and their World Athletics scores.
Yakob:
1500m | 3:28.32 | 2021 | 1269
3000m | 7:27.05 | 2020 | 1258
5000m | 12:48.4 | 2021 | 1252
Jacob:
3000m | 7:26.64 | 2020 | 1261
5000m | 12:48.6 | 2020 | 1252
10000m| 26:33.9 | 2021 | 1268
Half-M | 57:37 | 2020 | 1294
The reason Yakob gets way more recognition is bc he has already climbed to the top of mid distance running. But the thing is, Kiplimo has it a lot harder if he wants to do the same. He has to compete with WR holders at every distance from the 5k to the marathon. Yakob only had to beat Timothy. Tim's great, but he's not a Cheptegei, hes not a Kipchoge.
Also, it's worth noting that Kiplimo is probably one of the athletes that did not benefit from the Olympics' postponement, and Yakob clearly did.