Honestly, nowadays I don't think there is much difference between the top brands (Bosch, Milwaukee, Dewalt, Makita). Most of them use the same quality battery cells and the same quality motors. The bigger differences are when you get to the top brands like Festool.
I like Milwaukee and Bosch because of their 12V line of tools, which are great if you need some lighter-duty tools. I've also got a bag of Dewalt 20V tools since they were one of the first to launch those higher power battery packs.
The choice mostly comes down to price and the type of tools you need; Milwaukee has a massive assortment of tools, including some really handy things like cable cutters/strippers, PVC tube cutters, and more.
But since both brands compete with each other, I suspect you'll find they both have the same tools, quality and prices… (FWIW; Milwaukee is now owned by Techtronic Industries, the same company that makes Ryobi).
Personally, I've got tools from all brands; Bosch 18V since they have a wireless charging system, Dewalt since they were the first with 20V batteries, and Milwaukee since they were the first with a cordless soldering iron which I needed at the time.
It all comes down to the tool your talking about. Like port-a-band saws I have 2 Portacables, Power drills I like Milwaukee. Especially the Hole Hog and the right angle plumbers drill. Different gearing than the electrician's. Power saw's, I own a Dewalt 7 1/2. To replace my Milwuakee 8 in SDS Hammer drills AEG. 5 inch angle grinders, 9005 Makita. Electric die grinder, Metabo. Light battery powered screw drivers or impact, Bosch. Heavy driving a like my 18 V Panasonic. But it will break your wrist if you use it wrong. Drove a lot of lag's into the ceiling beams of a 1900 building.
I was very fortunate to have a tool supply company in the port of Albany. The NYS Thruway authority Would buy one of each brand for testing. Rotate them across each district and get feedback on each tool. When they found the best and most reliable they then bought a hundred or two to equip their crews. This information was returned to the seller. Who would relay it to a buyer that asked.
Prior to using this supplier, I bought what was easily available. My productivity increased with the better tools. They also lasted much longer.
Oh, Scott, You should have a Snap-On Iso-Butane soldering torch. I've had one for years, and it can't be beat in the field. Solder, Braze, Heat shrink, Direct flame, or cut and weld plastics.
Personally I am a Milwaukee power tool guy. I don't really delve into anything above the 12v line and Milwaukee is the best with that battery platform. They also have the most variety with their smaller battery line than any other company I have seen.
But brand preference is brand preference. Same conversation could be had about Coke vs Pepsi or Ford vs Chevy.
Between the 2 brands I say I would have to pick Dewalt. Most of you will disagree with my reasons.
I pick DeWalt because it's part of Stanley Black&Deckers which is an American company. They do make many of their tools overseas but in recent times they made an effort to at least assembling some of their power tools in the USA.
Milwaukee now belongs to a Hong Kong based company and is no longer an American company. Milwaukee don't make any of their power tools in the USA that I know of.