I have two similar guitars (HB Fusion-T) with the same model pickups (Roswell LAFs). I already had Elixir Nanowebs on one and I put these on the other. In terms of tone there is no obvious difference. As for feel the wound strings on the Elixirs feel better than on these but the plain strings feel much the same.
Comparing them with the older HB coated strings they are a huge improvement in feel and, I think, a bit brighter in tone. I don't yet know how well they will last compared with the Elixirs.
They don't sound dull to me, but the Elixir Optiwebs are a bit brighter and uncoated strings a bit brighter still. Given that they are about a third of the price of the Elixirs and no more than most uncoated strings, if they last well I'll be using them a lot, except for certain recording tasks.
Recommended for value for money