I'd say Seifer was the stronger. After all,
Seifer is reckless and incapable of following orders, but, on the flipside, he's capable of thinking for himself, something Squall doesn't seem to be capable of doing a lot of the time. In terms of personality, I'd say Seifer was the stronger, but it depends on what you classify as strength - a complete lack of emotion, or that inner fire that is barely kept in check. They're complete opposites, and both have their own strengths - Seifer's are just more noticeable, and I would say they are a lot stronger.
he sliced Odin up without even moving. That was the most awesome thing ever. Also, he did technically beat Squall in their duel at the beginning - he was just stupid enough to let his guard down after he'd delivered the "final blow", such as it was.
Seifer is reckless and incapable of following orders, but, on the flipside, he's capable of thinking for himself, something Squall doesn't seem to be capable of doing a lot of the time. In terms of personality, I'd say Seifer was the stronger, but it depends on what you classify as strength - a complete lack of emotion, or that inner fire that is barely kept in check. They're complete opposites, and both have their own strengths - Seifer's are just more noticeable, and I would say they are a lot stronger.