honestly tough to say, like I said they are completely different. and for me, certain songs are just easier to play on a long scale guitar, be it acoustic or electric, of any brand. My shortscale F-20 fits me like glove though, it is my favorite acoustic, but that is just me. the one thing about mine though, it is a 1970 Westerly short scale, but it was re-topped by Guild in 1980, with the top (all of its cosmetic features *plus the bracing*) that would have been for a long scale, so it is noticably heavier than an all original Guild shortscale from the 60s or early 70s (and has the bridge moved up for the short scale). i love it, i think its perfect. after playing my own for a while, i picked up a 1966 and it felt too light for my liking, but that is just me and my own personal experience. id probably look for a long scale Westerly with the flat back like that sunburst one on ebay. those late 70s Guilds are cannons and built like tanks, they are less expensive than the 60s models and they dont come around every day. With that said though, they dont feel or sound, to me, like such a "small bodied guitar". more like a regular guitar with that quintessential Guild dominance. If you are really after the small bodied thing, or a "quieter" guitar, or have smaller hands, id get the shortscale F-20 or even possibly an M-20. living in Los Angeles i would hope you can try a couple out at least. try Sam Ash, at least for the new M-20. I have not seen many long scale F-20s or long scale M-20s from the mid-late 70s at all. Theres the 76 F-20 I own, the 75 on ebay, and ive seen maybe 2 or 3 M-20s from the same time period (long scale) online, all of this since ive been paying attention, about the last 6-7 years. the shortscales are everywhere, new and old.