Rhino axles and the ADR axle and more questions.

Looking to replace both rears as they are original on my 08 and have been clicking forever. Looked on the super atv sits and they have rhino and a rhino ADR. What the difference? Is the ADR at least as good as stock? It’s about $80 cheaper.
One more question. I have a front that is locked up. I replaced the other side already but if I go with rhino axles, would one side being oem and the other being the larger rhino make the front act weird?