I am keenly watching this thread, I've just ordered a 2.0i and I too noticed that the engines specs are identical, it's great to hear that the parts are identical too - some real possibilities here without much risk as we know the 28i can support the extra torque/pressures stock.
Must be in the software, and software is open to abuse
I would love to get the stock engine map for the 28i and apply it to the 20i - is that even a possibility with a bit of coding knowledge?