I’ve tested the Hesperus and the Fatty Trail, the Bluto wins the day for me, though the Hesperus is stupid light and crazy high spec with those HED rims and Tune hubs.
The Fatty Trail uses a new rim, deeper sidewall, less burping at low pressures and a chunk of change lighter than the old Fatty wheels. It’s also running the El Guapo Fat Bike hubs which are six pawl, 72 POE and as good as any hub at anywhere near sensible money. They are at least as good as Hopes and sealed for British conditions.