Yes; the Panasonic 1.5" has a magnificent picture! But I just pity the guy who had to sit there at the plant and try to get convergence on it
The Sony KV-4000, in my opinion, suffers from too coarse of pixels. I have owned a half dozen of them including two industrial versions with that same 3.7" Trinitron CRT. It isn't NEAR as bad as a PortaColor, but somehow I think they should have done a better job on that tube. If you sit watching it from a comfortable distance; say 2 feet, you see the pixels. But the Panasonic looks great with no visible pixels even with your nose against the magnifier (need to be that close to watch it)...
One last word on the tiny color CRT situation: I proclaim that the early 5" Sony Trinitron CRT (KV-5000, 5100, 5200 and 5300) is the smallest truly functional color CRT TV. Any smaller, and you get a headache while watching an hour program. And the newer 80s cheaper 5" color sets (including the KV-5XB5 or whatever Sony called their Korean-CRT color set in the early 90s) just don't look as good as the early ones.
Charles