I have original ones 1966 with old tweeter. I've heard that they are better than new ones, XR. I never really like them. Maybe I pair them with wrong amplifier Saba VS2080, or maybe new ones just better but on this video they sound fantastic! What amplifier is working on this video?
I believe they are the same Tweeters. The sound has the same character, but the soundstage is much wider and coherent with the 33s which makes them sound more musical.