Frogman: I think speed stability has to be a consideration regarding any lube. Regarding leaner/weightier tonality, I'd say the DuPont goes towards weightier, but with a solidity that wasn't there before.
There are a host of other system variables that can make this issue a positive or negative. I'm currently testing preamp isolation and that is 'huge' with regards to the overall sonic picture. I'm glad this issue came up again, for it's easy to get "settled" on a system's sonics and then, change just one thing (like preamp isolation) and the whole systems' sonic picture can change rapidly.
There are a host of other system variables that can make this issue a positive or negative. I'm currently testing preamp isolation and that is 'huge' with regards to the overall sonic picture. I'm glad this issue came up again, for it's easy to get "settled" on a system's sonics and then, change just one thing (like preamp isolation) and the whole systems' sonic picture can change rapidly.