Bike radar tire test:
https://youtu.be/wqrbqRYrnB0
The Spesh Hill Billy came out well, similar looking to the shorty but better and faster rolling in their opinion.
Plus their only £35.
Not tried one myself but tempted to try the 29 version.
I ran a Hillbilly 2.3 on my 29er last winter, not ridden much this winter so not felt the need to stick it on, the few times I have been out the Butcher control has been fine.
I was very impressed with the Hillbilly, deffinitely an underrated tyre, it is not particularly wide, it is noticably narrower than the butcher 2.3 however this deffinitely helps when the going gets really wet and muddy, I found it to shed mud really well and maintained grip in places I know the Butcher would have been struggling previously.
Its currently hung on the wall in the shed, but will deffinitely be going back on if/when I need it. Great value for money too!