T1 is a much modified version of the original terminal, which had piers A, B and C. It is the central terminal of the current three. The EK 380 currently uses T1.
T2, to the west of T1, is currently being expanded/re-built, see up the thread for many reports on this. It should be capable for all the new wide body types.
T3, to the east of T1, is the smallest and most crowded. I usually fly KLM to AMS and then proceed elsewhere and so this is the terminal I know best and will be there again week-end after next.