I think you might have been seeing out-of-date information. There was a dispute between the lift companies around the QV last year, and Verbier was threatening to go on its own. But they settled that before the beginning of last season.
Their website hasn't been updated for the upcoming season, but you can see their prices for last season here http://en.verbier.ch/seedo/winter/prices#.VhVKnMl31Xk. If you look at the file name for the pdf link, you'll see that the top batch of prices is for the 4 Vallees pass, not a Verbier-only pass.
I'm not sure which area has the more impressive trams, but the EK has more of them, as well as two underground trains going up the mountain.
The transfer to Le Chable is definitely shorter and more convenient. It's about 2:25 from Geneva airport with one change in Martigny. So if you can make the 8:24 train, you'll be arriving in Le Chable before 11:00. There's a train every hour or so doing that route, so you're not up a creek if you miss it. If you're flying midweek, then the baggage area shouldn't be a mad house and you might actually make that early train.