Found an interesting online article from a 1974 issue of Popular Mechanics on the state of the art of CRTs here:
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The main differences (as I understand them) between the Trinitron and Linytron is that the former had a slotted mask which had continuous slots while the latter had slots that were separated in sections.
The article also mentions the Panasonic Quintrix system which had a round dot matrix but used an extra focusing grid.