Either way, you should try before you buy. The sound of acoustic guitars of the same model vary tremendously. Much more so, IMO, than electric guitars of the same model.
Neither the Martin or the Taylor is necessarily better than the other.
It depends on the individual guitar.
I played a Taylor 814C for many years as my #1 acoustic. I used it with a Sunrise soundhole pickup.
Mine was a great guitar but I've played other 814C's that weren't so great.
Same with Martin.