I have being running some Spesh tyres for a while now, thought I would share my thoughts...
Previously used tyres - used to be a Maxxis man: Highrollers, Minions, Ignitors, Bling Blings, Larsens on the back etc. Have recently ridden Schwables and a few different Specialized tyres.
Current setup - Specialized Butcher Control 2.3 on the front (26psi tubeless), Specialized Purgatory Control 2.3 rear (28psi tubeless) on a 150mm trail bike.
Trail conditions - A bit of everything. Regular loop is a mix of hard pack and pea gravel, essentially the most insanely slippery surface. Hardpack with rocks. Pine forrest loam. etc
Super stoked on the Butcher. Such a great tread pattern, running it in the DH casing on my DH bike too (went tubeless no worries). Perfect front tyre when you need something that is going to hook up in the corners, but still roll reasonably. Purgatory on the rear is decent, I wouldn't scream about it like I would the Butcher, but it gets the job done. Seems to brake and roll quite well. Matches with the Butcher front quite well, as it lets go first. When set up tubeless, the Control casing gives a very plush ride, really contours around rocks and roots well and dampens the trail a bit. The downside to this is that I have found it to be a bit squirmy in the sidewall when hitting high speed, hardpack berms though, and my rims tell me a little bit soft for high speed rock ploughing. Haven't had any problems ripping them though, which is good. Going to try a Purgatory in the Grid UST version on the back, hoping the heavier duty sidewall will give me the perfect combo. Wouldn't mind strapping a Butcher in the SX casing onto the back at some point for a try too...