Measurements are one thing, they have a linear correlation, however our eyes have a logarithmic response to light, so the 200 to 220 lumens will appear much less than the absolute value difference of 10%, totally indistinguishable unless side by side, and even then, not really noticeable.
Infinitely variable brightness is useful when you have your hand on the control all the time, and you keep on changing viewing distance but want to maintain a relatively constant target brightness, Interms of practical use, a 6 mode would cover practically everything you need for working, more is nicer
Whats more important is the UI, the UI is what makes or breaks the torch. Having 3 modes, on a reverse clicky with memory causes me grief when starting up with a mode lottery, while an electronic clicky with shortcuts to high and low really makes a torch work.
I like rotary magnetic ring control for the ability to set brightness easily, by feel, and during operation to any level, however its the battery life / brightness that tends to be a little unknown.
The V10R, vs the M10R... The M10R has 3 modes + strobe. Modes are well spaced, make sense, yet I still prefer to have the V10R. Maybe if it had 6 modes, that would give me more output options.
The HDS rotary is FAR from budget, but is an example of a torch with a rear electronic clicky that has 4 modes, each of which has a key press shortcut. Three of the modes are programmable to any brightness, and the last mode is controlled by a tail cap that turns through 350 degrees and can be completely operated with a single hand. It can be programmed to have no mode memory and start-up on the rotary dial. Interms of UI, this is the cumulation of the benefits of a button click, shortcuts based 4 mode torch, with the addition of a rotary interface with 20 brightness steps, and as far as I've seen around, pretty much the closest to the perfect UI.