How does engine braking differ in its mechanical effect on a front-wheel-drive (FWD) vehicle versus a rear-wheel-drive (RWD) vehicle on slippery roads?

1. FWD engine braking can cause understeer if the front wheels slip, while RWD can cause oversteer (fishtailing) if the rear wheels slip
2. FWD vehicles have no engine braking capability whatsoever
3. RWD engine braking only slows down the front wheels
4. FWD engine braking increases the risk of rollover, while RWD does not