I wanted to say inb4 Jay Peak, but, yeah...
In all honesty the amount of power doesn't depend as much on which area you go to as much as it does on if you know where to go once you're there. While Jay does statistically get a higher average annual snow fall, it also gets skied off faster because it has a higher percent of its terrain marked and easily accessible. Your best bet for skiing powder would be to get to know one area inside and out so when that killer storm hits, you can be skiing freshies a week or two afterwards in secret stashes. I ski Mad River and Bolton Valley about equally, but have skied much more powder at Bolton just by knowing about the places other people don't know about.
Remember, small amounts of snow, sometimes an inch or two overnight that only the mountains get (often this is lake effect in vermont, but it happens other places as well, idk, I'm not a meteorologist) isn't usually forecasted but can add up over a week and makes for some surprisingly nice conditions.
Pro tips:
-Go up midweek
-scout off-trail lines when the conditions suck so you can be ready for the good snow
-own a car that handles well in the snow
-You can ski in trees even if they look too thick, just turn really fast