The 110bhp focus is very much the same engine, its just some different injectors, turbo and ecu.
But the body of the focus is different, I wouldnt go down that route.
Do your car have a DPF? If not, you can buy the milltek non-dpf downpipe from pumaspeed, together with the catback parts you will get a complete 2.5" system, with only one muffler. Guess it will sound great.