One thing that has been totally omitted in the discussion, which to center around photos of two pens: the Sailor is a 1911S, which means it is the smaller model, yes? Aside from choice of material (a confounding big difference between the 2 choices so far), aside from nib quality and function (both should be good, Brian's tuned and Sailor of usually good quality, I enjoy both)...
... OP and no one else has gotten into which pen fits the hand best. The S (standard) model is a smaller pen, and I would definitely get dimensions for both pens to assure you will have the comfort-in-hand you require for a long-term purchase.
Lastly: I get that money does not grow on trees or flow from faucets, but people get way, way hung up on "profit margins" and crap like that. Buy or buy not, there is no try. Both pens are good, one is from a large, international company, the other from a single bespoke maker. And there are a zillion other pens out there at all kinds of varying price points. Pick the pen you like, that you think will suit your writing style, your personality, your hand, and your aesthetics. I can fairly guarantee that any 'extra' amount of money you might put into this will totally fade from memory in no time at all and you will have a pen to mark important times.
It is very possible to overthink things. Too much head, too little heart.
More info, just because:
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