I've never used American Bonsai tools. My first tools were a starter set from Masakuni, 45 years ago. So I've been spoiled. Some of those tools I still use! So, that speaks to their quality.
Since that first starter set, I have added tools one at a time. If it's a tool that I think needs high precision I'd would go Masakuni. My two most recent Masakuni purchases were for a pair of spherical knob cutters, and for a pair of "root cutters". I actually don't use the root cutters for cutting roots! I use them pretty much exclusively for making flat cuts on azalea trunks. I wanted a tool that would cut clean and flat.
Actually, the scissors I use most are the inexpensive ARS grape pruners with the plastic handles! The blades are slender so I can get in tight spots. And they sharpen well!
I also use the ARS scissors that are bent. I use those when repotting so I can cut the bottoms of root balls flat without my fingers getting in the way.
I use medical tweezers (tissue forcepts) for pulling needles and general foliage cleanup.
Pretty much any pair of bonsai wire cutters will do the job. I use basic blunt nosed Kiku wire cutters. I do a lot of wiring, so I splurged and bought a Masakuni pair of the little wire scissors that are small enough to hold in your hand as your wiring. They have loops on the handles, so they can hang on a finger while your wiring, and be there when you need them.
Jin pliers are useful. But then again, they are not a precision tool, so most any would work. I use them a lot while wiring, so I use a pair of Kandeshin stainless ones.
Something like a grafting knife needs to be the very best. There are many excellent ones, but I went with Masakuni.