Ah niceone, have you raced much. Different skills in what way?
Yeah, raced Monday and Friday track league this year in Manchester after doing a bit of club racing last year. The main differences I can think of vs road are:
Events tend to be much shorter with plenty in one evening, so you need to get used to the warm up-race-cool down-warm up routine.
Shorter events mean much faster racing with plenty of time above threshold. It also means it's hard for breaks to get away in amateur racing where no one wants to work (oh wait, that's just like a crit).
No corners/hills mean it's harder to predict where a break will go, so you need to be good at reading the race and knowing who the riders to follow are.
The different races mean it's not always a case of fastest rider wins, although that definitely helps! There are so many different ways to ride an elimination or points race which will hinge on whether you're a sprinter or a pursuiter i.e. pick people off from the back or set the pace on the front.
Gearing choice can make or break your evening, and you'll need to get used to sprinting at 130rpm+!
There's probably more but that's off the top of my head.