It's something special. And it's both hands. Most fighters body work is basically a left hook to the body and that's about it. Maybe they have good left hook to the body and people call him a great body puncher. Beterbiev has it all. He throws the left hook to the body, left jab to the body. His straight right to the body is brutal. That's the punch that broke Govzdyk. Also has a good right hook to the body. Beterbiev will often times double up to the body, sometimes even triple up.
You could definitely put him in a top five alongside maybe Canelo and maybe Spence - but none of those guys touch Inoue.
Inoue has a genetic advantage; small frame, light weight, very flexible, much easier to rotate and pivot for him than it is for larger guys. That's why I admire guys like Usyk because they are HUGE (6ft3 and 220lbs is a big big man) but he is fleet footed and has amazing angles. On the other hand when I see a blob like Fury make P4P lists I laugh because if anyone small had Fury's style they would have been sent to the hospital on a stretcher. These small guys are amazing to watch.