Stormy,
Both websites have been a boon for me when trying to ID an otherwise lost DX catch.
I used DX Tuners to tune to a radio in Tucson, AZ to confirm KTNN-660 from my location in Michigan. This station would have slipped through the cracks if I couldn't ID it.
Yes.com is by far my best site with ID'ing stations. The only downfalls are that some songs are skipped off of the playlists and not every station is on the site. My rule is if a station doesn't ID, I like to be able to confirm two, sometimes three songs via yes.com. Unless if it's a syndicated program, the chances of another station on the same freq. playing the same three songs at the same time are pretty slim.