Well, the two cards differ in a lot ways, including how one can use the points, benefits such as rental car coverage (primary coverage with CSP), etc. Both cards are blue, though. Have you started by looking at the info on each card at the Cap One and Chase web sites? Which card you put spend on simply depends on how you would use Ultimate Rewards points and the value you get from those points. I's start with whether you want to use CSP's transfer partners, or just want cash back.