20 stars is unreal, just being able to do the movements such a map would demand deserves the highest reward. Assuming 1:1 inputs, ofc. Like Peppy said, touchscreen essentially multiplies the # of inputs by 10, 1x tablet pen vs 10 fingers... jumps have to get really dumb to be too fast for a touchscreen player and by the time they reach that point they are already 10x faster than a tablet player can do. What's the difficulty of a ~8-8.5 star jump map, which we'll just say is a fair ceiling for what people can fc with tablet atm, made 10x faster? Probably higher than 20 stars. And if it all comes down to memorization rather than reading as you say, we can throw that out the window for both players. Touchscreen is mathematically provable to be easier for jumps, and by no small margin.
Therefore, ban all touchscreen players.
edit: or tablet players can start using 10 pens, to even things out.
Therefore, ban all touchscreen players.
edit: or tablet players can start using 10 pens, to even things out.