Wouldn’t the only difference be the diff gear not every thing else,
On the xx losi platform and the traxxas trx-1, blue eagle that was the case.
Edit the sc10 has metric bearings and the b2 b3 has imperial so probably not unless you can find a bearing to go from metric internal to imperial external diameter
Sc10
https://www.associatedelectrics.com/factoryteam/parts/details/9853-ASC9853-sc10_ft_ball_differential/
B2,b3 etc
https://www.associatedelectrics.com/teamassociated/parts/details/7678-ASC7678-diff_kit/