Shimano Entry-level 2-pistons: The Differences?
 

Guys, I'm looking at BL-MT201/BR-MT200 F/R sets vs BL-MT401/BR-MT410. The first thing I took note of was that both used the same Shimano B-type pads. But what are the actual differences - if any - in design and build quality? And do they matter in the real world (by "Real world" I mean a 20-inch folding bike ridden for errands and fun on mostly flat ground, rather than an all-out canyon-shredding MTB.)

As far as I know, the main differences (400 v 200) are:
-- aluminum vs. steel brake lever
-- two-finger vs. three-finger lever
-- caliper design/construction/appearance is in line with Shimano's Deore+ level mtb calipers vs. blocky/crude/'industrial' look of the 200s.

That's about it. I owned/used the 200-series ones before replacing them with XT 8100. They (the 200s) worked perfectly well -- they look clunky, lever rattled around a little, but they are perfectly good brakes.