I also find the eSwitch elegant, I like that it is quieter than the mechanical switch, and the eSwitch tailstand option adds appeal, despite the eSwitch quirk of needing a few minutes with a battery installed, to charge up the capacitor that fires the High Mode.
current model Tools, both mechanical and eSwitch have similar runtimes, iirc high mode spec is about 30 min…
maukka and I have had copper tools w mechanical switch from a few years back, that ran longer, and were more flat regulated, specifically on High mode. The other modes have not changed in efficiency or regulation, iirc
there is a long thread about all the variations here:
Im still a fan of the current run Tools, I added one of the Massdrop copper tools to my accumulation, because I wanted the eSwitch. They are 219c now, which I dont like as much, so I lego the head of one of my 219b Maratacs onto the Tool eSwitch body
the main inefficiency is on the High mode, which is not a mode I use much… I still really like the about 20 lumen Medium level, and it is regulated and runs long enough for me to consider it practical…
there are other differences, the Massdrop models head is LMH, while my Lumintop Tool and Maratac Heads are MLH, which I actually prefer (contrary to other’s preferences)
imo the brass Tool that is the subject of this thread, has many nice qualities… although no single light I own has every feature I like… and in the case of the Brass MassTool, though its brighter, I dont prefer the 219c, but, at least its High CRI