In a buggy, Large Motor (1515) or Small Motor (1512)?

[rootar]

weight difference not worth it, but driveable difference is much more noticable, ive ran a 1515 in my buggy and it has 1512 in it now, its alot more controlable on the track.

if you already have a 1515 i wouldnt bother changing unless you wanna go for a light weight setup and your seriously racing.