Performance and memory using sprites


i was wondering whether it is better to have on big texture combining
all graphics and use this as a spritesheet (tiling+offset) or have many

I added this graphic below to clarify my problem:
alt text

Does one big spritesheet hit the performance, when different gameobjects use it as a texture and even some gameobjects use the same graphic on the spritesheet?
Is it a good idea, to use on big spritesheet on ios platform as a shared material or would this blast the ram?

Thanks for your help,

Hey, did you get any answers to your question, or did you figure it out? I’m dying to know!