Unless your super concerned about weight, Shimano CUES/Linkglide is the way to go. It has revised shift ramps a lot like Sram Transmission which provides a far smoother and more consistent shift under load. I’m assuming it’s a city bike, so I would say do the 9 speed U4000 groupset. If you want a larger range, the 10 speed U6000 would be great or 11 speed U6000 if your winching up ridiculous grades on an eMTB.
I have also heard rather excellent things about Microshifts newer stuff. It’s a complicated tradeoff between the two lineups, Shimano will have better shift ramps and parts availability, Microfift may prove more durable and reliable in the long run. It may also be easier to source Microsfit as a home mechanic, compared to Shimano. It’s really hard to say, but both are rather excellent options.
37 mentioned!