Its maybe a little more efficiant than concentrate. Its good for those that are lactose intolerant.

i believe it absorbs a little better and less gas

whey Isolate does absorb faster than just regular whey concentrate.
It's also a lot more expensive!

i agree with the less gas issue. i notice a big difference when im taking isolate over concentrate my gut doesnt feel like it's going to explode. for me it's worth the extra money.

Isolate protein wow, thats muscle in dust form, very expensive but very eficiant