Many of the rogue trader weapons have descriptions of what they do on their webpage. For example the ork power klaw says it does more damage to infantry at the expense of damaging vehicles less. How much more/less? 10 precent? 5? It does not say under the weapon. They do SOMETHING different every one. By without saying how are we to tell if it is desirable in a situation. If I can as an example get a mod that does 10 precent more to infantry for my regular klaw? Why would I use the store one after I get that? I am doing the same to vehicles, so there is no downside.

TLDR. If weapons have mod slots you can see the bonuses. We need to know what we are getting on our rogue trade items in trade for having no slots.

Guess nobody knows for sure.

There's seems to be a erie silence around rouge trader weapons in general, I'm still looking for my missing power fist.