The Mexican-made Taylor's (100 and 200 series, for example) have a 1 and 11/16th inch nut width. In contrast, pretty much all the American made, all solid-wood Taylor's (300 series and above) have the slightly wider 1 and 3/4 inch nut width. Most people, especially beginners, find the slightly narrower width of 1 11/16th to be easier for gripping barre chords. This is especially true if you started out learning on electric, as I did. As I understand it, the slightly wider nuts may be preferable for fingerstyle playing.
From my experience testing out both types of guitars, I have found Taylor's necks to be easier to play, almost like an electric guitar. So if that is what you are looking for, a Taylor is worth a look, for sure.
It should be noted that many of the modern Martin's have slightly less chunky necks than the vintage one's. Some like that and some don't. They do seem to be making an effort to compete with Taylor for the customer who is looking for playability as their #1 purchase goal.
To me, I love the playability of a Taylor and prefer the tone of a Martin. You just can't please some people!