in a perfect world, there would probably be no difference
HOWEVER, foam does seal to the other members better than the "standard" fiberglass batts or blown.
HOWEVER, one needs to investigate the shrinkage, if any after at least 5years -- Icyene seems to be good
However, tightly blown cellulose is also good
one more time, INSTALLATION, INSTALLATION, INSTALLATION
WORKMANSHIP, WORKMANSHIP, WORKMANSHIP
and listen to & try to understand what the sales info states,
& what IS UNSAID!
How toxic is the material?
How flame resistant is the material? [remember that the paper around fiberglass will probably burn]
You would die before you got much air from around my windows -- lots of foam & caulk! lots of caulk elsewhere
harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!