the 210 1.8t engine comes in many codes , amk, apx, apy differences between the 210 engines and 225 are that internally the 225 bam engine as lower compression pistons which and also it as vvt which some tuners use as a tuning element but remapping either will give very similar gains because they run externally the same hardware , ie turbo, manifold intake etc. but on another note i've read that the ealry 210 models injectors actually flow at 350cc @ 3bar compared to 225 386cc @ 3 bar