All XTP bullets are the same. FTX is the plugged "Flex Tip" version in Critical Defense. If it helps, Hornady's levels are "American Gunner" is the lowest, "Hornady" is second, and "Custom" is their highest..but FTX rounds don't cross between. This used to be true before Hornady sent a tearful message that they were pulling nickel cases because of their price...but kept prices the same. Lame.
DEEP is really new. Not new, but not a lot was available when it came out. Only one seller on ammoseek right now. It's v2 of hydrashock with the post. Those were not always great in tests.
I liked the shooting the bull series, but I didn't find anything wrong with Fiocchi. One thing that rubs me the wrong way on Precision One...they sell a lot of junk rounds as a reloading company. To be fair, Sig that values their ammo at gold pricing, also sells factory seconds.
Just remember on super hot WonderWood ammo that they don't advertise, velocity increases drag at a 4:1 rate. Why a super sonic jet on earth can't just go light speed to go light speed, it has to go light speed plus 4xtimes to over come all the new resistance in drag. That increased drag is confused as "energy has to go somewhere, so it's going into the target" in gun forums. Simply not true. The energy in increased velocity on small handgun calibers is just going into drag. The hydroclastic damage is from rifle level velocity. Increase speed on an already borderline 380, then rapidly increase the rate of pedal expansion and you've go under penetration like you see in the massively expanded Cor-Bon bullets or Gold Dot.
I think shooting the bull made causal that Precision One is the best...but against all XTP, they all fell within "good" because they are the same bullet. Meh.
If you pic up a DEEP round, you're going to see it's like all copper rounds that expand the best, but go to shallow. But then there is the basically FMJ spire in the middle that is way lower than the original post in Hydroshok...bees knees.
HST is the biggest disappointment because in 9mm, it rocks the world of even 10mm/357 rounds for penetration and expansion. Just doesn't expand in tests.
I have boxes of all (underwood, original hydroshok, gold dot, hornady)...I think with all options, I am 100% good with my like of anything XTP or DEEP. My only second would be Golden Saber.
*replace Hydra with Hydro or whatever it is