I don't think I can hear AWG. Thicker wire has more resistance per foot than thinner wire, but the difference isn't detectable.
What I hear are nuances...and I look for these things.
Unplugged tone - the guitar must have a very acoustic quality. Rich and vibrant with lots of felt vibration and no fret buzz. Intonation must be 100% correct.
Quiet operation, lack of buzz, hum or "white noise." Lack of clicks or pops when touching the pickups.
Non-Overdriven Tone - clear, not twangy or sharp. Not muddy. Rich, balanced overall tone, even string to string balance. I usually play "Stairway to Heaven" or the intro to "Hotel California" to evaluate the clean sound.
Overdriven Tone: Full, clear, no muddiness, balanced lows/mids/highs, even string-to-string balance, thickness that still retains its "edge," such as a high-gain open 'G' chord, where the E/A/D are very fat and crunchy, but the g/b/e ring out with almost low-gain clarity - the "right" pickup, to my ear, will sound like two guitars playing at the same time.
For example, an open 'G' should sound like Dave Mustaine playing the E/A/D and the g/b/e of that chord should sound like Malcolm Young is strumming it.
The two spectrums of tone are clearly divided in my head and I'm listening to each string simultaneously. I can hear if intonation is out, or if the pickup is creating string pull.
Next is high volume behavior. This involves overdriven tone at a volume level of 5-7 on a tube Marshall at a distance of less than 6 feet from the front of the amp.
I will often walk back and forth, without playing any notes, just to evaluate the guitar's behavior.
If the guitar is well mannered (no squealing or other anomalies) I will start playing leads, usually the full lead to "Hotel California" (my warm up routine) and completely re-evaluate the guitar's tone all over again.
My biggest concern here is the guitar is controllable and has the same tonal depth and fullness at elevated stage volume...it simply must not get thin or "screachy" at high volume.
Case in point - my 2016 Gibson SG T Series with unpotted, vintage wound (7-8k) '490' humbuckers.
My first live performance with it, a few weekends ago, was irritating.
The SG has great tone...except on a small stage with floor monitors. In this situation, where the band was generating high stage volumes (without a PA or sound tech) the SG sounded very thin and bright...almost Telecaster-ish, and the minute I stopped strumming, it began to feedback wildly.
I immediately switched to my 2005 Schecter C1 Hellraiser with EMG'S (81 & 85) which are noiseless and do not feedback, so the outdoor gig (two 4 hour repeat sets with a 90 minute break between) went off without a hitch.
This experience is what has led me to change the pickups in my SG. I decided to ditch the open bobbins for a traditional covered PAF style pickup.
Seth Lover wrote that the covers reduced the high frequency response from the pickups and also made them quieter, which makes sense to my ears, and reflects my experiences with PAF's (styles) in general.
So, when choosing my pickups, I knew, based on this live performance, I wanted certain things...
Impedance - since my 490's sound great, I did not want any overwound pickups. The 490T is around 7.8k and the 490R is about 7.7k, (what many call "Vintage Wound," because that's close to original PAF specs) so this was a huge part of my selection criterion.
I also wanted to stay with Alinco II because I always, always, always find them to have smoother overall tonal response.
Next is the cover. You want to avoid magnetic covers! I prefer German silver that is nickel plated. Avoid chrome.
Next was full wax potting to eliminate/control feedback.
I considered a lot of pickups...but what I found from GFS had everything I was looking for.
The Classic II's are vintage wound to 8.2k (bridge) and 7.8k (neck) and have nickel plated, German silver covers. They are also double wax potted, meaning the space between the bobbins and the cover is filled with wax, which is an important feature of feedback control.
So, these GFS' cost me $90USD shipped for the pair and they had every feature that I was looking for...and that's why I bought them.
Now, I just need to get them installed...