I think it depends too on which models. I've got a Yamaha FG730 and it doesn't hold a candle to my all Koa Taylor in any way. Interesting enough the bass on the Yamaha holds up pretty well to my Taylor 614CE but comes nowhere near it in the mids and highs, but the 730 is a dread so it's expected to sound different than the 614. The 614 is great live and records very well too whereas the 730 is just so so recorded. BUT the 730 cost $300 and it's the best $300 I ever spent. I have yet to play a better sounding low end acoustic than Yamaha. But that's me
Interesting enough I've never been that big of a Taylor fan and I do think they are overpriced. I picked up the two Taylors I own from friends at good prices. The 614ce I own is a 2000 model that didn't even have 20 hours on it and is in total mint condition for $1400. I could not walk away from that. The all Koa is was $500 or $550, don't remember now but it has real nice tone with a sweet bass to it. I would not buy a new 614 but for what I paid it's quite nice, especially recording it.