First touch, I felt same with the FD 35/2 White nose. Quite heavy. And the ring filter is same as modern lens, 58mm.
pictures below shot@ wide open
|Focus in the center (red plastic birds)|
|Focus on jewelry around right ear|
I like the colour produced by this Solid metal body lens. Its really different from FD 50/1.4 SSC.
So itsn't just half stop that make the price double. Build quality, and the colour rendering is different.