Yeah, i assumed as much about getting stuck. Desconsidering function, do you find they behave similarly in terms of even roasting, taste, etc?
Have you tried the spherical in the SSV/DBV as well?
I think the spherical LSV connection is a bit better in taste, but requires rotation to keep even. Used right, I think it can roast as even as the ground glass, but the bowl in general is wider.
And no, only tried GonG connections with SSV and DBV. I've used the standard SSV once, but it wasn't enough to say too much about it.