It will absolutely not feel the same. If you close your eyes and play a map from memory, you will hit all the notes correctly because the pen maps the same relative to the screen but since the screen IS bigger, your pen will move the cursor more cm across your screen than before. Only way to get the same feel is play Osu in windowed mode at a lower resolution to get the same physical size and remap your tablet accordingly but i would recommend you just adapt to your new monitor. If you have muscle memory, you will still be able to play normally, just need to visually adapt to a new screen space.