The initial choices were: "Supreme Intelligence", "Superior Intelligence", "Extreme Intelligence". [0]
Then he removed "Supreme Intelligence" because he said it reminded people of the failing Supreme Court, and it was down to just "Superior" or "Extreme". [1]
Then, presumably after some industry people talked him into a compromise, he decided it was actually between "Superior" or "Super Intelligence", and the latter won. [2]
[0] https://x.com/realDonaldTrump/status/2101350559328416142
[1] https://x.com/realDonaldTrump/status/2101698074166882517