FWIW, I thought I'd come back on here and say that I put carbon rims on my Revolt Advanced and holy crap, what a difference. This is only after one ride, but the bike is transformed - much quicker, more responsive, and fun. While riding, I ran into a friend who I ride with all the time who was on his Emonda and we rode together, and I was able to easily keep up (though pulling was still tougher than my road bike). That would have been a struggle with the stock rims.
I still think that of the two the Checkpoint is the better do-it-all road/gravel machine, but the Revolt is definitely improved in that category with better wheels like the Revolt Advanced 0 has. I was looking at inexpensive lighter aluminum rims for ~$400-500, but my shop called and one of their employees is selling his for $600 with tires (WTB Riddler 37s) so I didn't think I could pass it up. Now to really test out my marriage and get some for my road bike!
