I have a 3/8 Hoppe (Solingen), and have tried it, it is a pretty good shaver, but a little bit harder to go on with. (As I know, it's normal). I have another 3/8 blade, but I need o clean it up.
In my opinion 3/8's can be good shavers, but a bit harder to go on with, compared to a 5/8, or a 6/8.