Having grown up in Kalamazoo, I've experienced a lot of claims about what makes the difference in a good sound and have known several people who designed and built pickups on a larger scale. Many of you have heard many opinions also. Decades later these observations keep pouring in. A couple of days ago a long standing friend suggested a set of strings that made a big difference. I can only conclude that for many of us this tonequest has no end.
I have been humbled several times when I was unhappy with the sound of a set up or pickup only to hand the guitar to someone very good and was amazed at the tone.
My impression of Schallers is that they are decent. The tilt engineering is clever.
Here's a relevant video. https://www.youtube.com/watch?v=9mURVofPTnY&t=222s
I'll venture briefly into another realm- the Strat. I have one with the original pickups and a David Gilmour EMG set. There is a huge difference that to me is worth the investment. https://www.youtube.com/watch?v=4ozl28iKM0E