7.2 update came with full content cd?? not simply upgrade??

i just got in 7.2, but am still waiting for enough reason to actually install it. i recieved what appeared to be an upgrade cd, and a disk for a full fresh install, with content. is this the case?? if so, what are the pros and cons of just 'unninstalling' and doing a complete fresh install, as opposed to just 'upgrading'? i am wondering because i have been 'upgrading my way' since logic 5. and to be honest, from the beginnings to now who knows what i've got going on under the hood. also, whenever i get a laptop, a fresh install would make things simpler. the only things i would want to transfer up would be my personal channel strips and presets for plugs.