identify - crocosmia vs. gladiolus corms

OK - couple of years ago I planted these together. I waited too late to dig them up and now have them all mixed up. I should have tied some strings around the crocosmias but that was then and this is now...
Any way to tell the difference in the corms to separate them? They look just alike to me. Some are bigger, but the shape and color look the same. Is there some subtle variation? Some are pretty big - anyone know what is the size limit for glads? - maybe that could separate some of them.
I hate the idea of planting them all together again...
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