The biggest difference not mentioned in the comparisons is the fact that yes both systems will work in a pub but the full range PA and small/no backline option can go bigger without hiring/buying/borrowing/storing/transporting more kit, I've never been in a band that rigidly sticks to one size of venue, large function room, marquee, small pub, big pub and outdoors have all been done on the last few years, sometimes at short notice, two RCF tops and a bag with the mixer and leads in combined with a combo for monitoring and I'm set for anything from the tickled trout to a 500 capacity marquee.