compare two files by name ending, throw away one

Hi, maybe someone can point me in a direction to get this solved. I often get two picture-files which have the same name with a different ending

xyz_small
xyz_big

Since I sometimes just get the small (or just the big) file, i need a rule to compare: if the big one exists, then i want to throw the small one away.

Anyone with any help?

You'll have to use a script for now to do that. In the future, there may be a way to do it using built-in conditions but for now, you'll have to write a script.