1) I've haven't run across a product that is color dependent. They all pretty much say to test an inconspicuous area for color fastness before cleaning.
2a) Lexol cleaner/conditioner is a favorite on the board and sold at my local BMW stealer.
2b) I use Guardsman products that are made for fine leather furniture. You can buy them here<---
I use it on my car because I've used it on my home furniture for years with good results.
3. You can price and compare 100's of car care products here.<---
Scroll down to find products by type or manuf. name.
2004 E60 530is, Delivered 12/12/03, TiSilver/LGrey, PP, SP,PS, PDC, ACC, FRS, Step, Xenons, clear bra, body colored rear inserts. (Retired, 1983 henna red 320is)
2004 Corvette Z06 Commemorative Edition