This is a fair assessment. My family calls Cannon "home," but we ski a fair bit at Bretton Woods as well. Comparing the 2 with regards to skiing ability, I find...
Never Evers: Cannon wins. Their Tuckerbrook area offers a lot more "bunny slope" options for people who have never skied before vs. Bretton Woods "learning quad" area
Beginner trails beyond bunny slope thru Intermediate skiers: Bretton Woods is the clear winner. This is their "bread and butter," and they do an amazing job grooming, so even if mother nature has not been kind, the conditions are decent at Bretton Woods.
Strong Intermediate and Experts: Cannon wins here. They have more challenging trails and more variety to their trails (pitch, curviness, groomed vs. ungroomed, trail width) than Bretton Woods, where many of the trails have the same feel. However, even in good conditions, the mountain has "pinch points" that get skied off early, so we rarely ski past 3pm (usually call it a day sometime after 2).
Glades: I love Bretton Woods glades, probably because I'm not a strong skier in the trees. They have a variety of steep vs. tame, but the tree spacing is always "reasonable" to me. I've gone into some of Cannon's "easier" glades (Lost Boys), and still find it too tight for my liking! However, my kids and husband love the glades at Cannon, so this is definitely a personal preference (or ability) kind of thing.
Lines: Cannon almost never has lift lines. If I have to wait more the 5 minutes to get on a lift it's a busy day. At Bretton Woods, you can wait up to 30 minutes (or more) on any weekend.