P1 has much larger volume and will require more hauling and effort, keep that in mind!
The ISK will depend on your location and if you can find buyers. You will have to do the calculations yourself based on your situation to see if p1 or p2 is worth it for you.
I personally can’t really get rid of p1 or p2 where I live for any reasonable price so I tend to only produce what I need myself or sell the p3, which is easier to move and thus easier to sell.