The only real difference between the UK and Taiwan models is that the Taiwan frames are made with 4130 steel rather than 853/631 steel. Additionally there's approximately 0.2mm more steel on 20% of the tubing on the Taiwan models, but this doesn't really affect the weight with the Taiwanese coming in just 120g heavier. Ultimately it is down to the preference for UK made, and the tradition of the Reynolds tubing. The frame-sets look almost identical, have the same geometry and tubing specification and the welds are of a very high standard throughout. You would struggle to tell the difference if you were to ride them both so the decision is more about the origins of the frame and maybe the elite paint offered with the UK frames will be a factor.