True. I think the only time all the modded T50RPs will sound the same is when everyone uses the same setup and everyone aims for a natural sound. If that is the case eventually it will sound close to the same.
I got mine today too and so far I'm like them. There is a good amount of bass. You must not have a good seal if your are not getting enough bass. Try the flip mod thing. I kind of subconsciously did it when I was putting the TF10 on the same way I do with the B2s. For me at least, I do get a better seal this way. While I really enjoy the TF10 I still prefer my modded Fostex T50RP over it.