Maybe there was already a thread on this, but I didn't see it. I think this is going to be like the "Jack Nicholson's Joker vs. Heath Ledger's Joker" for Star Trek. I think the way the played the character was very different, Montalban's Khan was fiery and passionate, whereas Cumberbatch's was cooler and flatter. Also in STXI they actually gave flashes of Khan's intellect, whereas in TWOK we just get told about it over and over again, but Khan doesn't really demonstrate it. Cumberbatch's is more devious, Montalban's is more direct.
So- overall, who was the better Khan?