Probably less cold, a bit kinder, and more punny to the point of being comedic relief at times
Also, as a result, he'd be a caring little brother figure to the group, backing them up, and helping out in tech-related odd jobs with his A.I. assistant Pascal, who may be another source of comedic relief in certain moments.
Also, on a P5 storyline related note, Kamoshida would be drastically different in his distortion. He would still see himself as a king, only this time, the abuse of his students would be (a lot) less brutal. Instead of breaking Ryuji's leg, he'd likely just set him up to get in trouble, causing the track team to dissolve.
(edited by Rom_Dolos)