As I'm understanding the OP's question, what folder & FB would be my favorite, past or currently owned, that's under $100 & how did they compare to my customs, if I've had any for a frame of reference.
With that understanding, I'd say a waved Endura for the folder & a Becker for the FB. Just about any of the Beckers (I've had a 2, 3, 7, 9, 10, & 11), although I prefer the Camillus made ones. Those might be getting harder to get, though.
As to how they compared to my customs, they don't. F&F, blade steel, comfort of the handle, smoothness (On the folders), etc, are just better on the customs in comparison to the under $100 folder/FB.
Not sure what says, though.