I will comment a bit even though i havent ridden either board. So take it as is
I have never heard a single bad comment about the Villain. On the contrary... everyone who has ridden it recommended it to me.
But the two profiles will feel different, so it depends on what you want out of the board and your conditions. Also, if you find the Machete too stiff it may be worth thinking about it; unless you mean the Machete GT?
The Westmark will be better for less aggressive riding, good for buttering, skate-type ollies (the kind where you load the tail for pop), and general float in powder.
Villain better for a bit of more all mountain charging performance. It's not overly aggressive but it should feel noticeably more stable and grippy than the Westmark. Will take a bit more effort to jib and load the tail/tip but should have better pop off jumps (the kind you jump with both feet). Sintered base is faster if you take care of it. But from what i remember is about as stiff as the Machete.
So i guess, for more mellow jibby floaty powederish riding = Westmark
For more aggressive park all-mtn groomer riding = Villain