Originally Posted by Gdot
The 341 can be just a tiny bit narrower at the toe width than the 348. Due to the more rounded configuration of the 341 and it's overall shorter length. I have pairs in both lasts and despite this minor difference find that both fit me well in the same size.
The slightly tight toe on the 341 eased up quickly with a few wearings.
I also wear the same size on the 341 & 348. The fit is different, as stated above, but for me, not enough to size up/down. Good luck!