I disagree. I think it's significantly different than BoF's EX turn. First, as far as I know, you can only get one extra turn in BoF regardless of agility, so agility basically acts purely as a threshold stat for this purpose. It's binary. If you have enough for an extra turn you get one, and if you don't have enough you just get the one turn per round and that's it. Hypothetically, in Xenogears, and probably not just hypothetically but actually in the case of Citan and Rico, you could get three or more turns before another person gets one. Second, the EX turns are all done before regular turns and then regular turns proceed. This is pretty different than, say, being 1.5 times as fast as other characters in Xenogears. In the EX turn scenario, the fastest person would likely go twice in a row (assuming they're the only character with an EX turn). If a character were 1.5 times as fast as others in Xenogears, they would get to go more often, but the second turn would still be after the other characters' first turns and only catch up at the third turn/second turn mark. The difference is proportionality to the speed/agility stat such that the ATB bar fills proportionally to that stat. In BoF there is no proportionality, it's just a threshold. In Xenogears there is. If you want to still call it a round, I guess that's fair (although in the case of Xenogears, enemies will also probably lap Rico so they're getting multiple attacks per round and he's the one slowing down the closing out of the round), but I think it's pretty different.