Well, I own an SP-01 Tactical, a P-09, P-07 and P-01 all set up with Red Dots.
First let me say they're all exceptionally good guns; so it comes down to what fits you best and what you want it to do.
I have less than 1K rounds through the P-09 (waiting on a holster to try it out in competition); while I have 1,000's through each of the other 3 so I can't say for sure about the P-09 yet. But so far.........I like the SP-01 slightly better because it IS heavy, smooth, and accurate and I like the P-07 because it's light agile and accurate. I think the P-09 falls in between.
I used to say "If I could only have one gun that does
everything really well it would be a P-01". However, if money enters the equation, it would be a P-07. That little P-07 has really grown on me.
Perhaps the same will happen with the P-09.
All I can say now is.........good thing I can own more than one gun!! YMMV
-Vinny