BobJS
Headphoneus Supremus
So you are using a default gray-core silicone tip? It's an equivalent of medium eartip size with a shorter insertion depth. You are probably not making a good seal to assess the sound. Again, without you mentioning what you don't like about it, it's hard to help you. But, just a random guess, the seal is poor, you don't hear as much bass, and the sound is thinner and brighter to your ears? Wasn't the included tips in a resealable ziplock bag or something like that? You opened the box anyway, might as well carefully open the included tips to properly audition the W80.
Wait, you just said you prefer UM Pro 50. So, if you have UM Pro 50, they all use the same thin long nozzle and the same eartips. Why not go through your Pro 50 eartips to test W80?
The tip I'm using is the Star silicone tip with size denoted by color coding on the core (mine are large-orange). It looks the same as the ones included. In the past, I've always preferred star to foam tips, but I could try.
The sound issue I'm having (which could really just be a matter of acclimation) is that there seems to be too much bass actually. Or rather emphasized mid-bass rather than extended low bass. The highs are nice and crisp, which gives me an impression of hollowed out mids combined with a "mid-bass sheen" all over the music.
I've listened with my DX90, computer->Grace m920, and computer->Mojo. It's actually starting to sound pretty good out of the Mojo. Never mind ... just pretend I'm not here ...... this is what happens when I post too early after an acquisition!
I'll be back later after a thorough (psycho-acoustic) break-in .