I have Dynasonic number 13xxx, oval badge, 1968.
I also have Dynasonic number 716068, Big R, 1977 which I have owned since 1979. My first drum.
Stripped both drums down to the bare shell, weighed them. Same. Some differences in the weight of the lugs of course. Throw offs were the same. Frames with wires were close. Butts, eh. Slight differences in top hoops, and naturally differences in the bottom.
While they will weigh differently dressed, they are by and large, Same drum. Given same heads, identical tuning, and original wires, you would be hard pressed to identify either drum correctly while blindfolded. Also, an oval badged drum my be more popular with collectors.. the concept they are significantly BETTER sounding, is BS.