It might not look that different in the pictures but there is significant difference between the results. Shoe applied with Collonil Diamant does feel much more moist, very so slightly oily, and with deep luster that I've failed to capture. Shoe applied with Saphir Renovateur appears to be shiny, polished, conditioned but yet slightly dry. It's probably like facial care products; there are thicker creams that conditions better and there are thin and waterly creams that slightly conditions but does not leave a greasy touch.
Chogall i think you know that you are comparing 2 completely different products?
the Diamant product is a neutral shoe cream polish when Renovateur is a conditioner with cleaning properties!! you can see that in action by applying both products with cotton cloth and after application looking at the surface of the cloth!
the Diamant by its definition (as a creme de lux) stays at the surface and make the surface of the shoe look really nice!! the renovateur on the other hand is getting deapply in the leather nourishing and conditioning it( because renovauter contains water makes the surface after evaporation looks slightly dry,and thats why is recommended to brush after about 3-5 minutes and then apply a cream polish! 15 minutes is extremely long time at my opinion ,waxes has already solidified and it is really hard to raise a dicent shine)
http://www.collonil.com/en/1909-leather-cream.html this is the nourishing-cleaning cream of collonil for hi quality leathers! and for its perpuse is a really great stuff!!
i am using both products for long time , for me the best way is combining 1909leather cream and renovateur when you want a deap nourishing and conditioning!!