UR 242 vs UR RT2

Hi there!
I’m looking at these 2 interfaces and I have few questions:
1-do they work smoothly with Mac OS Catalina and Logic?
2-if I plug in my outboard pre into the line input in the rear panel will I bypass the interface pre and hit directly the converter?
3-Neve transformers are quite attractive, are they worth the price difference?
Thank you