Overall, a very nice summary!!!

Hilton offers a few of the things that are also mentioned for Marriott. Also, please note that it's now more rare than the norm for exec lounges to be open on weekends w/ Marriott & not all properties will extend brekkie coupons on weekends if the lounges are closed (that too used to be more the norm).

BTW - until reading the above I had forgotten a couple of things that Hilton does better than Marriott. I'm still a big Marriott person though.

For other comparsions between the programs (as others have also asked), I'd suggest doing a search (upper right corner of this forum).

PS - Silver at Marriott is basically like Silver at Hilton. Doesn't get you much.

Cheers.