As the title says, I can't decide between these two bags! I need a plain black smallish bag which I would carry for work and casually. I have until the end of June to decide so I would love some input if anyone has the time 
Factors I am considering:
Style - I only want to buy one black bag so I need this to be a style that won't look dated in a few years. Although I love the look of the Celine, will the winged sides stand the test of time? Plus I LOVE that you can monogram the Fendi.
Wear - As stated, I want this to last, so it needs to be able to withstand general wear quite well (I plan to use this bag maybe 4-5 times a month). The saffiano leather on the Fendi is slightly convincing me that it may be the better choice in this category but I could be wrong?
Functionality - The Fendi seems more practical as it's easier to get into BUT I like the idea of a shorter shoulder strap on the Celine as it seems the bag would be at an easier height to access. But then the flap/zip combo on the Celine seems a little complicated.
Designer - I already own a Celine Edge in medium so it would be nice to own a bag by different designer (I don't have anything by Fendi).
TLDR - I think I do think the Celine is the slightly prettier bag but that the Fendi will be more practical. Am I wrong? Which is the better bag? Or am I missing any similar bags which could be my perfect bag? (Not a fan of the Givenchy Antigona, Prada Saffiano Tote or Saint Laurent Sac du Jour)
(Pictures not mine - from Google)

Factors I am considering:
Style - I only want to buy one black bag so I need this to be a style that won't look dated in a few years. Although I love the look of the Celine, will the winged sides stand the test of time? Plus I LOVE that you can monogram the Fendi.
Wear - As stated, I want this to last, so it needs to be able to withstand general wear quite well (I plan to use this bag maybe 4-5 times a month). The saffiano leather on the Fendi is slightly convincing me that it may be the better choice in this category but I could be wrong?
Functionality - The Fendi seems more practical as it's easier to get into BUT I like the idea of a shorter shoulder strap on the Celine as it seems the bag would be at an easier height to access. But then the flap/zip combo on the Celine seems a little complicated.
Designer - I already own a Celine Edge in medium so it would be nice to own a bag by different designer (I don't have anything by Fendi).
TLDR - I think I do think the Celine is the slightly prettier bag but that the Fendi will be more practical. Am I wrong? Which is the better bag? Or am I missing any similar bags which could be my perfect bag? (Not a fan of the Givenchy Antigona, Prada Saffiano Tote or Saint Laurent Sac du Jour)
(Pictures not mine - from Google)