Since writing this I've put another hundred or so pellets through both guns, and the TX has settled down to a much healthier 11.4 ftlbs - even Bis Mags & Hobby's stay well under the limit - I'll just have to keep an eye on the power in case it creeps back up.
Unfortunately, the HW hasn't changed at all: still low on power (9.8 - 10.2 ftlbs) and twangy. I've already ordered one of Welsh Willy's fine kits for it.
Consequently, the above scores will have the TX edging it over the HW.
"Every normal man must be tempted at times, to spit on his hands, raise the black flag & start slitting throats"