I think you have to become clear what you want to use the bike for. I have got a P9 and it doesn't climb too well. It is a dream on the way down but really not on the way up. It's long, it's sturdier and hence heavier in any aspect (frame, wheels, components). Everything is design to work fantastic downhill. If Enduro (90% down, 10% up), bike parks, downhill is what you are after, go for the P9. Btw, robust downhill parts are usually more expensive. Robust Enduro parts even more because they are meant to perform as well has downhill parts at a fraction of the weight.
The P1 however is the better balance. Some people say that a 130mm in the rear match just fine 130-160mm travel at the front. I am also using a 130/120mm combination in a Scott Spark clone. And if I had to choose, I'd stick to lower travel bike because it also offers great performance on longer tours and in technical terrain. (With compromises on faster decents of course).
That said, I luckily don't have to choose.

Don't necessarily stick to components you have. Swap them to have what suits your bike choice best. Corona should help to give you ok deals.