I also have a question about these filters and perhaps I didn't read things correctly. I am very new to printing and have based almost all of my knowledge on David Vestal's The Art of Black and White ENLARGING.
I don't mean to intrude on the thread at all. Also, I've read the Ilford PDF.

According to Vestal, VC paper usually=Grade 2 1/4 or 2 1/2 paper with no filter in place.
Do you folks typically find that the #2 filter prints with the same, a little higher, or a little less contrast than no filter at all, or does it always just depend on the brand of paper? I know I could just run a series of test prints but am curious to anyone's aswer. I can't seem to find an easy answer online.