The blue one looks more special to me, it's the kind of dials Seiko excels with.
The black one, while looking great as well, is more tool-looking, a bit simpler, and probably easier to match with straps if you want to.
I guess it also depends on what else you have in your collection. If you want something that stands out a bit or something more "every day" or "under the radar".
I would go for the blue one because I like watches that have something to call my attention: mainly color or dial finish. If you found a good one, I would take the chance.
The power reserve could be low, it takes at least 55 turns of the crown to fully wind this movement. I would do it in the morning and wear it at least 8 hours every day for 4 or 5 days to see the real life accuracy,then, it is out of spec take it back for guarantee repair.
I bought mine for 725 euros and spent 170 euros on the original Seiko bracelet because that is how much I like Seiko diver bracelets.
I haven't found any quality issues on mine, the bezel aligns perfectly with no backplay, (my SPB207 has some backplay). It is running around +15 spd, without regulation. I could spend 50 euros and have it regulated, but I don't wear it so continuously to matter. The watch stops after 3 days of sitting in the watchbox so I have to set the time again.
But as you say, none of this matters if you don't like how it looks or wears. I love mine, especially in this dial color, that copper color hits me when it shines in the sun.
I looked for a vintage-inspired skin diver for a long time, but I couldn't find anything I liked better than this one considering all the aspects: looks, brand history, price, and quality.
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