I missed replying to this so I will say something now. What I meant was any processor ending with a U vs. an M, QM, or XM. I know processors are getting better and will use less power though I wouldn't want say a rMBP using a ULV processor that is designed for a MacBook Air.
The order of products that interest me starting with most to least to give you an idea with regards to processors.
1. Mac mini
3. 15" retina MacBook Pro
4. Mac Pro
5. 13" retina MacBook Pro
6. 13" MacBook Air
Ah I understand. It's no big deal. You could have just been driven insane from debating people on this board who try and reach too far outside the box of what Apple will ever do.Hope things get better for you soon.