So if you can't have them in the inventory, how does V, or do you mean high street cred weapons?Difference is that in theory, enemies won't drop items you can't use and you will never have them in the inventory. If CDPR made things right (or better at least) vendors shouldn't show items you can't buy until you reached the required street cred level, but same for dialogue options, they like to show us even stuff we can't use.
Just to be clearer, I hate it, but it's a little better than TW3.
It still has the problem of identical items with different stats, which I really hate.
As for weapons looking the same with different stats, I hope we are able to take all the best stuff from one weapon, and add it to another weapon. If gun customization is really really good, maybe it won't be bad to pick up the same gun with better or worse stats, because V will already (you will already have) painted your gun a different color so you don't accidentally confuse them both?
In that case I don't think it would bother me too much, because the customization would be so good that I always know which weapons are actually my weapons.