Here's what I did in a similar situation at a Hilton recently.
2xDouble beds was quite a bit cheaper than a king bed. Don't really care what I end up when travelling by myself, but of course prefer a King.
Booked the double room, but put a note in to say something like I'm happy with the double, but don't require 2 seperate beds so happy with either that or a another room if it's easier for the hotel.
The Hotel applied my HH Gold to the booking which has a preferred King Bed. So I ended up in an Upgraded King Room.
Saved quite a few $ with that, but would have been happy with the double if given.
So if same price, go for what you want. If cheaper for room chosen at check-in, then go for that if you are happy with a double bed room on the 2nd level facing the laundromat. Although a King could quite easily be in the same location or you could be upgraded to a room that actually matches your profile with HHonors.