I took my 314ce into my local dealer to have a little work done on it, and after explaining what I need to have done, the guy says "Let me take this in the back and take a look. While you're waiting check this out" --and hands me a 914ce. Then he says, "While you're at it, check this one out, too" and hands me a 614ce.
Then he sends me off into the acoustic room with both while he checks out my guitar and helps other customers.
My brief observation--The bling on the 914ce was just unreal. So super-nice and upscale. I never really cared much for an arm rest before, but after playing this for a few minutes, I could tell the arm rest felt really comfortable.
The 614ce was WOW! to me. I liked the tone better than the 914ce, but I couldn't really say why, and the beautiful understated appointments were just perfect. It was nice, but not too nice. If I was going to buy one, the 614ce would be it.
I know there are a lot better reviews by those more knowledgeable than I, but those are my brief layman's observations. And I have to say, after playing those two back and forth for about 30 minutes, I still kept reaching for the 320e they had sitting out. There's something about that one that I really like, too. Regardless, I've got my great 314ce to keep me company, and I can't really complain about that.