Northern Vermont tends to get substantially more snow then southern Vermont does, with Stowe and Jay Peak probably being the leaders in the "natural snowfall" category. (Northern Vermont is usually considered to be areas north of Killington and southern Vermont is everything else).
However, instead of snowfall differences, I think the differences are best expressed in terms of terrain. The more northern areas (Stowe, Smuggler's Notch, Sugarbush, Jay Peak, Mad River Glen) are substantially steeper than the majority of the southern areas (Okemo, Mt. Snow, Stratton, Bromley, etc.). i.e., there are blues at Stowe that would easily qualify as blacks at Okemo.
Stowe gets a lot of high marks in various reviews because there is something there for everybody. i.e., there are cruisers, there are long bump runs, there's tree skiing galore. i.e., you can make it easy and you can make it very, very hard.
Everyplace in Vermont has "something for everybody", the question is "how much of the something you're looking for is present"? For instance, I like skiing bumps, and Stowe (northern) and Mt. Snow (very southern) Vermont both have lots of bump runs, so I tend to visit both of them pretty much equally (depending on time constraints, recent weather, etc.) Okemo, on the other hand, has two or three bump runs, and I get bored to tears there pretty quickly.
It sounds like you're more into the "cruising" mindset? It seems like every groomed cruiser I've been on turns into a scraped-down semi-icy mess at some point during the day regardless of how much snowfall there has been lately, so I'm not sure if the north vs. south snowfall differences would affect you that much. The question I'd be asking yourself is "how hard are you willing to push it in terms of terrain and steepness?", etc.
If you want to be mellow, have fun, enjoy some fresh air, see some scenery, and just relax -- southern Vermont is probably a better option, all things considered.
If you want to push things a bit, explore the mountain, and "skiing is all there is" -- northern Vermont is probably worth the trip.