isolate vs cold process whey protien

whats the difference btwn the two ??

i know cold proccess has to be blended were as isolate can just be mixed with a spoon but the guys at those nutrition places says isolate is absorbed faster and better

but is it really that much better ??
5lbs of cold process is $50
6lbs of isolate is $100

whats your input on this ??

edit: prices are in CDN dollars