Hi, having played on and off for many years I always felt the standard size CG was holding me back, mainly due to the stretches required in advance pieces and having small hands.
I had convinced myself having a smaller than standard sizes CG was somehow a compromise, however in the last 6 months I bit the bullet,sold up my standard CGs and reinvested in 3 smaller models:-
Cordoba c9 parlour (7/8 body size with 630 length and 50mm width)
Ramirez 2NE short scale length (636 length and 51mm width)
Asturias custom 630 (630 length, 50mm wide).
From my own perspective all the above have proven easier to play based on these off the shelf models. To this I had the bridges shaved slightly to lower the action and went for medium gauge strings (savages, HB). I found this improved the playability and for me has opened up a new enthusiasm for tackling those pieces that could never quite get right. My left hand is under less strain as a result and I find I can therefore practice for longer periods....and get more of the stretches!
Having said all the above, I have noticed a reduced volume in these guitars, but in terms of quality of sound nothing particularly noticeable to me.
Having made the plunge into the smaller scale, I haven’t regretted it and doubt I will ever go back to a standard 650mm.