Not sure if you're aware, but there's been scientific studies showing this - the results of the most extensive and recent study are at
https://www.ncbi.nlm.nih.gov/pubmed/21995650. If you don't want to read it, the TL;DR is squirting is basically watered down piss while female ejaculate is thick and white like semen.
But, if you want, you can still tell people you were so good you made a chick piss all over herself and you.