One thing is if you look at Chargerstores chart, he mislabels Gen 1 and Gen 2 every time. I told him about it a while back and he acknowledged it was an error but never fixed it. Real Gen 2 is incredibly aqua and neon esque.
It took for me to get a Gen 2 sealed in a box with the right serial to solve this one for myself. I ended up collecting 3 gen 1s in the process until I got a gen 2. Without them side by side it’s really hard to gauge. As a side note, Gen 2 seems to be the rarer of the bunch (and is chargerstores gen 1, which carries a higher price tag as well).
The biggest difference if you don’t have both to compare is the lugs. Gen 1 has very rich blue lug pins in comparison. If you view the difference in my picture you’ll see what I mean.
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Me, I'm feeling the Blue Gen 1 more than Gen 2's pastel lightness.