this is one detail about the old D'Andrea picks I like so much - there is no seam/center line, it's super smooth.
The reissues do have a tiny seam, however.
I am super sensitive about details - and there seems to be quality differences too - but on my Delrin picks the seam is no ridge or something and not noticeable at all. I have never played a smoother pick (that still gives full control) yet. But I haven't had the D'Andrea pick in my fingers ?
I can imagine, that the D'Andrea picks are rounder, warmer sounding. The Delrin 500 1,5 has surprisingly forward dashing mids and can sound bright too - depending on the angle. The Ibanez JTC on the other hand sounds way more consistent / almost the same when changing the angle. I like both for different things.
After slightly improving the bevels / edges of my Titanium picks I am right now reworking the stone pick. First test showed, that the agate can be polished to be INCREDIBLE smooth. A test with a different bevel got me way more control too, so I will rework the whole pick step by step. Titanium was not too hard to sand and polish, but that stone is really something else Needs a lot of effort, patience and accuracy. But I believe stone picks can be much better than they were offered. And this thing will probably last a few years - or centuries.
After trying also higher price stuff like Gravity, Chicken Picks, Timber Tones, it feels a little strange that my favourite (Delrin 500 1,5) only costs 0,31 € ?