I used it just because I pulled his stats first. Regardless of who the benchmark is though, KP is better in Sacks and INTs, although virtually tied with Ward in INTs. I think his low TDs/attempt is a function of his relative inexperience. I was an RB in college, not a QB, and I've never coached, but it seems that as a QB gains experience through regular playing time, he would take fewer sacks and throw fewer INTs while throwing more TDs/attempt.
So for me, the fact that KP compares very favorably with two experienced QBs with respect to sacks and INTs and he is still very inexperienced, makes me want to see him start this year and have King continue as RB/Slot/QB with KA as the official backup QB in case KP goes down.
I just thought of this: KP and DK both on the field and the drive has been going for a few plays, picked up a first down or two. Suddenly, they line up for the next play and DK is QB and KP is WR. Go deep baby! Think we could surprise anyone with that?