In a simple nutshell, Rasant is too soft for me. It bottoms out in counter looping, doesn't suit the way I loop to attack instead of drive smash into the blade.
I put a lot of energy into an attacking loop to have very easily blocked back relatively slowly.
Compared to Donic Bluefire M2 it is a no brainer choice for me. I would choose Bluefire M2 any day of the week.
The surface grip felt the same the only difference is most probably the hardness of the sponge.