do mud tires work well on a banshee, do they slow it up a bit because of the weight?

i live in pa and ride in everything but sand. also i do colm (coal) hill climbs that are very hard to get up. do you think i should go with a mud tire ( BLACKWATER'S)( 20") or stick with sport tires ( razr's or holeshot's) (20")????

 

I had a set of Realtors on mine for a while....They hook up pretty good, But they are heavy. Now I'm running bandits with about the same results.

For Motocross use, I Have a seperate set of Holeshots which seem to be just fine..But they wear fast.