Hilton London Kensington vs Doubletree Victoria

My wife and I are visiting London for four nights in August on vacation. I will use an AXON reward. I've narrowed it down (I think) to Hilton London Kensington vs Doubletree Victoria. I'm Diamond and the Kensington has an executive lounge. The Victoria looks map-wise like it is in a good location (but both aren't too far from a tube, so not sure how much that matters) and has a queen bed available vs double in the Kensington. This will be both of ours first time to london.

I read the posts on here and trip advisor, but am still having a hard time deciding. Any suggestions on which to pick? Thanks in advance!