Some like a big V8 car and others a small diesel. Some like the big N-frame, for me the L-frame is already on the large side compared to my hands. I have had a N-frame, to big for me.
What disadvantages are for the one are the things to like for the other.

I have a 696 and I love it. Of course a 686 has advantages but......I have a 686 too.