I don't think there is enough gain to make a great comparison between the pl and the other pedals. I tried it out yesterday at my local shop and was very surprised how low gain of a pedal it was. I could see it used more like a clean boost more so than an OD. I was actually thinking more Klon vs. Pork Loin threads would start poping up eventually...
BUT I must confess I only spent about 10 minutes with it, and there are internal trimpots that I didn't get to play with. It is EXTREMELY versatile and like the above post indicated, the blend knob is what makes it so cool IMO.
I am not a fan of internal trimpots. I mean I can appreciate the set it and forget it portion... but the amount of time it would take to fiddle with them to find what you like is just not attractive to me.
You'd have to actually play the pedal to see for yourself. Turning the gain down is not the same thing as a clean blend. I like the PL's clean blend much better than the SD's. It blends much better. You also have some control over how "dirty" the clean blend itself is (internal trim).