Here's a fresh-ish grid comparing a variety of EF and similar fountain pen nibs. I tried to limit it to pen+inks with thinner lines to keep it manageable.
Still some variance by ink but not a ton in this group. I tried to use more Diamine Sapphire Blue, which is a bit on the dry side compared to Pilot Iroshizuku inks.
The Platinum UEF is still the best. Kakuno is still the next best. Penmanship is nearly the same as Kakuno.

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