Not even a question in my mind.
Taylor!
The original 416 Rigby ballistics from about 90 years ago were perfectly good. The Taylor gives us the same bullets (or better) at the same velocity.
More velocity is not an advantage that I can see. The Taylor can be made to very nice standards on a M-98 Mauser, and it holds 3 in the mage with ease.
The rifles don't have the drop belly, which is something many love to look at, but I for one, like carrying the standard size mauser and mag much better than I do my larger rifles. Brass is cheap
Bullets are plentiful
The shell used cast bullets well.
It's cheap to shoot (and therefore practice with)
It does everything I would ever want or expect of a 416, and I have made much nicer rifles for a give budget with the Taylor than I can with larger and more expensive actions. If a man has a given budget, he gets nicer wood, more of the gunsmiths art, and more ammo for that budget with a Taylor.
If Ruger comes out with a "416 Ruger" I assume it would fill the bill as well, but as of this moment, I'd vote for the Taylor without any hesitation