Guys with B737 hours are likely to go to B777 with EK, airbus guys tend to go to A330/340/380. Just a matter of reducing the risk of failure during the training.
Rubbish. Few months back, I had lunch in Doha with a former student of mine who had spent the last 4 years on a small Nintendojet in Asia and went straight to a B777 TR with QA. How about that? Stop speculating on "which type", it is likely to drag you into the P2F/SSTR dungeon!