Are PC Engine hagaki (registration cards) unique to each game?

[/turboG16]

I know a lot of registration cards from various publishers definitely deviate from the standard Hudson Soft blue 162 labelled ones, but are there any differences or unique labeling on those standard ones?
Could they be assigned to any game that uses them or are they game-specific? A quick google search didn't yield any results, and neither did very simple image translating.
I've been collecting hagaki complete PC Engine HuCard games for a while now, but if all the Hudson Soft games use identical registration cards, I might make the hunt a little easier for myself and start filling out my collection with cardless copies.

submitted by /u/XeroShinobi
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