C seat on UA 767 are the old one right? Always try to get 744 for me. I will fly to Paris, and the 777 from IAD is more appealing than 767 from ORD in C and F.
No, the seats are identical, save for the small width difference noted above. I actually **prefer** the narrower C seat on the 763, but I'm rather skinny. In F, the difference is very important (suites vs. 90's-style F seats).