Burning fight > SOR
I voted SOR1.
Overall I think SOR2 is the better beat em up, however, I don't like how any of the characters play outside of Axel. I think the other 3 play pretty shit tbh. However...
I love using all and any of the 3 characters in SOR1. I think they all look and play great! The game doesn't look as nice as SOR2 (looks quite heavily dated today tbh, but still charming enough) and SOR2 has a a more in depth system, but overall, I enjoy the feel and characters in SOR1 more...
There's a hack out there that adds english to the original JP rom with no other changes. If you've got a ED or emu setup I recommend checking it out.