The best use of Chase UR points is to transfer them to a partner, not direct purchases of travel. Their transfer partners are excellent.

Also, the CSP (or CSR) offers outstanding travel insurance if you use it to pay for the ticket, which is not offered by your Citi AA card. So it's really not accurate just to compare points earning. But FYI, the typical valuation of a Chase UR point is around 2.2 cents, while AA miles are valued at around 1.4 cents (these are TPG's valuations).

I have a whole bunch of cards for different programs, and CSP gets the bulk of my spend. It's always a competitive choice, and often the best choice.