The cfp-90 is alot more comfortable........... they are HUGE, be careful not to over pack after 10 miles or so they can get HEAVY
The plastic slider for the straps broke on mine after little use. I did get the pack used. It is now rigged with a big patch and is no longer adjustable. works fine.
+5 on style points with an Alice though. They just look cool and make the wearer look hardcore
A regular internal framed hiking pack made from fancy water resistant material is the most comfortable, most practical.