ButcherT9/PurgatoryT7 tire setup

It's a great combo for wet conditions. The Purg is a good rear tire in T7, T9 Butcher is almost too sticky IMO. I have a wheelset with this combo, but that only goes on for bad weather rides where I expect some downhill charging on natural singletrack root/rocks/mud/soft etc. Doesn't roll well on the transport sections, to put it mildly

When I traveled to pick up my Stumpy Expert, the shop staff told me that the stock front tire- Butcher GRID T7 - had a defective bead, so they installed a Butcher GRID Trail T9. It still had the stock Purgatory in the rear.

I've only had the opportunity to do one 2-hour ride on the new bike, but based on that I would concur with knutspeed. The T9 is super grippy but does not roll very well. Not sure if this is a result of the "Trail" tread pattern, or the stickier rubber compound. Probably some of both. The shop supplied me with a regular Butcher T7 for their cost, which I will install for three season (i.e. not winter) conditions.

Agree, it's a combo of the thread & compound.
When rolling my bike into the garage after riding home from the trails, the T9 is full of sand/small stones/gravel that you have to rub or pick off, whereas the T7s will be clean. You can even hear & feel the dust and small debris spray if you ride down the road. Once on the trail, it's definitely a big confidence booster when it gets slick.