So I just spent about 15 min trying out both pencils in usage with various leads and the Rotring is superior to the Pentel in both comfort and control. I switched the lead to 2H but I also tried the HB and the H and I think I may end up at H after this is done. One thing that always was a bit offputting about the pentel was distance from the grip to the tip seemed long for how I write and it would irritate my supporting finger, the Rotring decreases this distance by 5-8mm which is long way and much more comfortable.
The Pentel is officially retired as of today and will become my backup pencil (too bad I just bought spare parts and a backup of it is sitting at home).
Very happy with the purchase
Now I need to find a package of eraser refills (which are 800 only and I can't put my own eraser in). I don't use the erasers except in emergencies but I want to have spares.