I'd say the M-10 has better metering
I would dispute that. The metering on the R-09HR is a lot bigger and easier to see than on the M-10.
My comparison above was to the R-05, specifically "
Having had an R-05 for some time I'd say the M-10 has better metering and is a lot easier to adjust". I have no experience with the R-09HR...
The M-10 has idiot lights as well (-12 green and before 0 red), so one doesn't need to read the display. I was of mixed opinion on that at first but given my old eyes I've come to like that aspect. Blip the green at least occasionally and you're golden... Running conservative if you see a red flash dial it down slightly. You probably didn't clip there but you might if you leave it untended.
I didn't add that the battery life seems better (m-10 vs. R-05) as well though both run nearly forever on a pair of AA's.