Televue Plossls 10.5 and 10.4 mm

I have both of these in my collection. Which one is older? Better? Any comments appreciated. :S

The 10.4: Wider top, taller "slope" Inscribed in green "TELE VUE 10.4MM Plossl Japan" with symbol in green. Symbol is a U or N in a circle.

The 10.5. Smaller top, less flaring, about 2mm shorter. Inscribed in green "TELE VUE (R) 10.5MM Plossl"
"Japan" is engraved on the side.

Thanks
John

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I don't have either myself. Which one do you think is better in use and why?
-Guy