i had a FOCUS RS, ( 300bhp ) which i can say is a truely awesome car.
never driven a LCR, so could not comment on it.
as the RS is a limited adition, only 4,500 made & 2,500 got into this country, it looks good & dose turn heads, there are plenty of mods to take the car from standard 212bhp - 450bhp.
but be expected to pay around the £15,000 for a good low milage car, & anyrhing up to £20,000 for a car with plenty of mods & well looked after.
but i will agree with all others that the LCR, has more gizzmo's inside etc:
here is a pic of the FOCUS RS i used too own.