Loads of comments on here re AA transatlantic offering being pretty good.

I am travelling DXB-LHR-DFW with work next week last minute. Am going to book business but have the option of doing either BA or AA on the LHR-DFW leg. I've heard this is the 773 but am not sure as BA website just says 777.

Anyone have a recommendation as to what to go for?

Despite being silver i've never actually done J on BA, only ever with CX. I'll be on BA001 next month, which i appreciate is different to normal BA J so looks like my BA business travel will be coming along like busses. Guess BA then AA will give me exposure to each but the 1h 55min connection in LHR on the way back might mean BA would be a better option?