MTW has a much better feel i think, i prefer it, both campaign and battle map. this may well be because dropping from 100man units to 20 man units (i have to use lowest unit number setting) is an annoyance. i also want shorter campaigns, like in medieval, where you can start at a more advanced level so you dont have to start with town watch again...
ai is better yeah, considerably in my opinion, used to MTW ai i lost horrible against an outnumbered force of only cavalry in my first v/h v/h