I have a 462, it’s a great amp. I had a pass 250.8 prior. Both are excellent.
I think the 462 is actually just a shade more neutral, which surprised me. It’s neutral, and very powerful. If it matters to you, it also measures quite well.
I think that yes, it would be an improvement. But more so if you listen a bit louder, and enjoy dynamics. A shade more neutral than the 252 I would also think.