Which is better?

I have both, but I don't have much time on the tubular clinchers yet. Only two races and they were pretty dry. It is going to be pretty muddy for tomorrow's race.

Any opinions?

For mud, I go with my Mud2s over my Tufos.

I'll being running Mud2's for the first tomorrow on a course that should be very muddy but also with occasional larger rocks. How low can I run my tire pressure and still avoid pinch flats?

I have Tufo's for dryer conditions. Kenda Kross Supremes for teh mud. I'd use your MUds.