Struggler, the leather seats ARE NOT 15kg heavier than the cup seats. The cup seats are cloth because it's cheap, not because it's light. The ph1 is not any faster than a cup, in actual fact, there's more difference between one ph1 and another than there is between the ph1, ph2, cup, 182 etc etc.
The cup is lighter and doesn't have aircon, so, with an equivalent engine, it will have more bhp/tonne.
To be perfectly honest, there's bugger all between them. The reason I bought a cup is because, if you're planning on stripping the car, you'll be getting rid of seats (so the leather is pointless), air con (because it saps power) and the interior.
The cable throttle does give great response, but the FBW is by no means bad, and that alone is not enough for me to want a ph1.