the mp110 is a decent compromise between the two
I am comparing my MP110 stylus on a MP10 body with my M44-7 & an OM5.
The 2M is 2 generations newer than the OM ( OM-> OM Super -> 2M), but have been told the sound signature is similar, and styli are compatble
the M44 has a big forward and punchy sound, probably the best for old bollywood records, but the high end is not so refined. the OM gives better highs, but at the cost of the low end . the nagaoka gives both. another alternative is the M44 with an elliptical jico stylus.
the problem is that the MP110 is not worth the additional cost compared to the others. I would rather have an M44 with a regular & a jico elliptical stylus. the nagaoka gives that list bit of sparkle, but for me the cost is not worth it ( i bought it for cheap in japan, but us/uk prices for it are crazy)