I currently have a Sunlion with the TI/UK transistors and a regular gain NKT275 Sunface and have previously owned a BC108. I personally prefer the TI/UK to both of the others. It has more gain than the regular NKT275 but still retains a very warm character and still cleans up pretty well. I think I have a recording of me playing with the TI/UK Fuzz. If I can find it, Ill post a link here.
I really want to try these trannys...I ordered another modded Fuzz Face a month or so ago and almost went with these trannys, however I opted for the high gain NKT-275 and am quite happy with those but I still want to try the UK/TI's as well...too many options!