I really don't get this pad-on-pad thing you're talking about, why does it matter if it's a hard surface under the mouse itself? It's not like you're slamming it down or anything.
Seems what is more important to me is to support your forearm/wrist wish squishy gel like I do. For ~15 years I've used something like this:
I also bought this a long time ago but have never used it.
kept it in plastic for ~10 years planning to use it some day but figured I would wait until I moved out and keep using my old mousepad.
Never did move out, but when I lent my current mousepad to my mom I went looking for this and it wasn't in the gym bag I used to keep it in, so now I'm wondering if I had moved it to another box at some point due to having trouble closing the bag.
I have a bit of cash now and am setting up my own mailbox for parcels so I'm thinking I should order one of these
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Any thoughts on which? I don't want to get the exact same one in case I find it, but it would be cool to own a set.