@ded You showed combo videos from MKG and MK4 (N64), you can do the same combos on MKG than MK4 and vice versa?
everything from mk gold should work in mk4 arcade. there are few damage differences (for example reiko: hp,hp,hk,hk, flip kick, jump hk, teleport SUJK, RH is 50% in mkg and i believe home ports, while it is 48% or something on arcade).
the arcade version of mk4 is also smoother, therefore i believe reiko's teleport hp in corner is a real inf while in mkg, it would be more like a 100%+ combo. the sujk juggles are also easier, which will allow more advanced sub-zero combos (they would be still possible in home ports and mkg tho, but much more difficult)
i believe kai's weapon lp also is faster in home ports and mk gold, which will cause unblockable punishers for blocked lk/hk for example, while on arcade it is blockable.
there are few small differences here and there.
@MKK hanzo can also put some inputs.
as for mk4 extreme, i used the pause trick for some of the combos, which is n64 exlusive. the rest of the combos should work in both arcade and mk gold.