First of all, I don't know what the difference between the two is exactly.
When I was shopping for a 2" diag for my LX90, I thought WO had a SCT type & a
regular 2" type. I have the $130 model. I switched since the stock 1-1/4"
diag stunk. The generic 2" SCT diag I picked up originally didn't clear the
base of the LX90. The WO 2"SCT diag is nice & worth the money. That's it in a
nutshell.

Ralph
41 16N 75 50W