if you want the same kind of characteristics from the mx master (dark field laser, connect to 3 devices ...), you should look for the mx anywhere family which is smaller for mobility purpose.

I think this may be too big for someone who has small hands. I guess it depends on how you grip the mouse. The Logitech G603 or G703 may be more comfortable for longer periods of time.

2S actually stands for Series 2 - it's the second generation of this mouse. It's great tho