Shower rollers - are they universal?

[OM2]

One of the rollers on the shower door has come off.
I looked on ebay and Amazon, loads of replacements available.

Just wondering though... are they all universal? From what I can see... they come in 2 sizes only.
The type we have is screw in. There's other types that are press button to take off - that would be handy.
I was wondering... if I get the press button... would it fit my other type one?

Thanks.

 

[jj4091]

The press to fit/release type rely on the shape of the runner to be able to lock in/release you would need to compare the rails as well as the rollers