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Doh! I had Sutro on my mind from a preceding in-house exchange and, when I saw the "CA" in your location, I put 2 and 2 together and got 2.5 and didn't notice it... Kindly disregard the oversight.
Anyway....
I'd expect the DB8e, 91XG, or the DB8 (in that order) to outperform the 7697 on UHF (only). I've also found that any tree in front of a UHF antenna is usually bad news, so keep the consideration of the UHF antenna in mind as you plan out your install.
I tested a KT100 several years ago and found that it's noise figure measured very close (within several tenths of a dB) to it's advertising claim. However, that ultra-low noise figure is achieved by leaving the front end wide open to anything and that makes their amps particularly vulnerable to ESD, static, or impulse discharges that blow out the front end. Additionally, they do not come in an outdoor housing which must be acquired separately.
I'd separately amp the UHF antenna with one of our PA18s and use your existing AP8275 and 7697 for VHF service only, then combining the signals after the power inserters using a standard UVSJ. It's a bit more complex of an installation, but it allows for fine-tuning not otherwise possible.
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