Twsbi Diamond 580 vs ECO Fountain Pen Comparison

Can't decided between the TWSBI ECO or Diamond 580? I couldn't either, so I bought them both and shot this video! The ECO ( amzn.to/2JtgaO4 ) is much cheaper but the 580 ( amzn.to/2JGYLVm ) is still an incredible bargain.
Personally, I'd say SAVE YOUR MONEY and get the ECO. It writes just as well as the 580 and it's much cheaper. I really like the ECO in Broad and in Medium, both write great and as perfect for day to day use. The 580 has some benefits, like the faceted barrel, better looks, larger nib, and replaceable section but these aren't enough to justify the extra money.
Twsbi Eco Specifications and Review: unsharpen.com/...
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