Cobraman - The 210 and 225 LCR's both remap to exactly the same figure, so you don't get any more power if you buy the 225 and remap it. The engines are 99% the same and, more importantly, the turbo is the same as it's this that limits what power you can get out of the engine. So if you're going to remap the car, it makes no difference what age of LCR you buy, you'll end up with the same power and torque.
Just so you know, the Cupra remaps to 200-210bhp and similar torque figures. If you want any more power than that from a Cupra, you're getting near to Big Turbo conversions! That's why the LCR is the better buy if you're interested in big power.