First of all, do you want to drive of a humbucker or you don't mind a bit less? Because the Tone Zone S would drive the amp harder with its output being similar to a humbucker, whereas think of the Injector as a louder single coil
Good question!
I'll expand on why I started looking at the Injector. I kind of stumbled across it looking for a middle that can quack and a warmer/hotter neck that still retains a strat sound. It seems that end of the Gilbert set is what I want. I have a handful of HH guitars and a modified SS jag sound great clean, but not so good dirty (which is OK). Also, I tend to like HS configuration. It seems in my HH guitars I almost always have the neck coils split (even though I hate hum). My go to guitar is an HS thinline which really rocks, you wouldn't think...
The Gilbert/Injector reviews say the bridge Injector isn't just a loud single coil, but is warmer/fatter and _almost_ humbucker-ish. This got me thinking that maybe this can rock out and also maintain the strat vibe in all positions. But I have to take review with a grain of salt. I bought a $$ boutique pups before that I liked less than a $30 overwound alnico 5 GFS pup (which is still in my thinline along with an areaT)
Of course, on the other hand the Tone Zone S would probably give me a sound and feel I'm used to. That could be good or bad as I have that sound covered. Still, I know 90% of the time I'll be rocking on Bridge pup.
With the guitar I'm looking to put these in the bridge just doesn't rock, it only seems to twang. In this configuration it wont be used a lot. I guess it comes down to finding an sc that can rock and maintain a strat vibe, or go with a business end bucker and clean end sc setup. I want my cake and eat it too!