i don't know about the others, but the crawlers clean up REALLY great.
I stopped using my clean channel now, cause i only use the twin volume knobs on my les paul to achieve clean sounds on the lead channel, that how geat they clean up! Lower the neck pup volume to about 6 and lower a tad your picking dynamic and the sound is clean and clear, no mush.
Plus the split sounds are really nice, thinning up things really nicely, if it's what you'er after from a clean sound...
Since i got my crawlers, i haven't plugged my footswitch, period.