I use the white ones that are a little softer.
Those are hard to cut but they will cut with a SHARP utility blade.
Just takes a bit more effort. You could heat the blade up with lighter.
Just be careful if you have vinyl floor under it.
They actually cut very easily but you have to have a wood chisel. They shear very nicely with a firm/smart tap of a hammer. They are great. You dont have to remove them and Ive never had a problem and I have been using them for more than 25 years