Dont. you need the maf thats matched to your ecu and pipework, so it wont work.
Even on 'like for like' leon cupras there are several versions of mafs, which if incorrect wont work correctly.
But if you want to know..
the LCR maf has a larger diameter housing, so it wont fit for starters without changing all the inlet pipework, and even then the figures the ecu would recived would be incorrect and require the ecu to be adjusted. all for no benefit unless you spent 1000s more on a larger turbo and pipework. Which would be easier to do by just getting a LCR.