YOU SAID:

It's his haircut for sure, and although his walk is different than what I remember, I'm sure it's him.

INTO JAPANESE

それは確かに、彼の散髪は、彼の散歩は私が覚えているものよりも異なるが、きっとそれは彼。

BACK INTO ENGLISH

It indeed, his haircut, his walk is different than what I remember, but I'm sure it's him.

INTO JAPANESE

それは、確かに、彼の散髪、彼の散歩は覚えているものとは異なるが、私は確信している彼です。