takeshi wrote:jeffysdad isn't the first to think of this. I don't recall what other discussions on other sites have stated but anyone considering this may want to Google around first.
Anyone considering the two should really carefully review the terms for each. IIRC I do rent vehicles that wouldn't be covered by the CSP's coverage but are covered by AmEx premium.
The CSP coverage has a set of vehicles that are excluded (Ferraris, porshes, etc) and a $50K cap (or so, I'm not going to dig out the booklet.). The amex coverage has no set list of makes excluded, and covers to $100K. The amex coverage also offers token coverage for death and dismemberment, and some excess property damage. (The lmits are really low, and can easily get blown throw.)
Neither covers pickups, motorcycles, moving vans, antique vehicles, or liability.