Hi there!
Just had a closer look on some of my knives (

) - and I?m not sure the combination tool does replace the two individual tools in terms of functionality. The blade of the separate can opener is sharpened, which isn?t the case with the combination tool. I also like the big screw driver the individual bottle opener provides - and the small one at the end of the can opener...
So, I guess, it?s rather a question of 'Does size (or layers) matter?' or 'Which are the functions you?re going to need most?'
By the way... there?s a way to order custom-made knives at Victorinox???