I'm a new forum member and shooter here, hopefully not too full of stupid questions though

Here is the first stupid question anyway

I see Nikon, Leupold and I'm sure other brands make scopes marketing specifically for rimfire rifles.
What's the difference from a rimfire scope and centrefire rifle scope?
Obviously there are quality things like glass, metal or plastic bodies and that kind of thing, but for just putting a crosshair over a target I'd have thought a scope is a scope...