Well as you are in Sheffield its got to be buffalo !, some one on here(i think)says they have a factory shop. I have both the buff sp6 & the snugpak version. I got the snugpak to replace the buff when i wore the buff out, as i was no longer going hill walking & could'nt realy afford a buff.
The snugpak is not as good, but it was half the price, it does(IMO) have a better collar than the buff but thats all. Everything about the buff says its made for extreme use, & that is what mine got, walking cycling canoeing, dog walking, its been used & abused, its now ripped in a number of places & the pile is worn threadbare. The snugpak won't(again IMO)is'nt made to with stand the rough treatment that the buff will take, but the biggest draw back is its not as warm, & having no waist adjuster you can't trap the warm air in.
I'm saving up for another buff for when the snugpak fails or is damaged beyong repair.
Rob