I have the Escape AC 60, picked it up the first year it came out despite being worried it would have the little things I don't care for fixed. Overall, I really like it, and I'm glad I bought it the first year because the price went up though nothing changed.
The pros: it's really comfortable; I carried 40 lbs full pack weight when I spent a week in Yosemite. That included the bear canister, which wasn't a pain because the pack has its framesheet, and then it has padding between it and your back. The hipbelt is nice and big, and it doesn't chafe like other brands did under load. Also, I really like the angled water pockets. I usually will eat lunch while hiking, so I stick my Logan bread in one pocket and my poncho in the other if expecting rain; grab and deploy while on the go. The compression straps are the perfect length and can really cinch the pack down. The belt is removable, as is the lid, and the lid has belt loops underneath for use as a daypack.
The few cons as I see it: it's (comparatively) heavy; even without the lid, trimmed mine is 50.8 oz. The belt removes a lot of weight, but that defeats the purpose of a framed pack. The framesheet can be removed, but the straps connect to the framesheet, not the pack, so it isn't really removable. The belt has MOLLE webbing rather than being plain or pocketed; ever try to find REALLY lightweight MOLLE pouches? Lastly, 60L seems optimistic for its volume; seems closer to 50 or 55. Haven't measured it to make sure.
Like I said, I really like it. It's my bigger pack and can handle the weight of a longer trip easily. I wouldn't want to go much beyond the 40 lbs I've had in it, but I wouldn't want to go heavier than 40 period. Also, the stretch pocket is nice; I don't like having stuff hanging outside the pack, and in the winter nothing gets snowy.
Can't say anything about the Blaze, but I prefer the Escape's general pack style personally.