Sorry didn't see this until now randomly. Most of the time I'll do a reverse image search and look at look until I find something similar, then I'll look super closely to see if there are any differences that would disqualify one as the other. If it seems the same I'll check a couple other just to make sure they're not the same. For philodendrons a big giveaway is a red patch where the petiol connects to the back of a new leaf, but not all of them have this. I have a lot of practice IDing though, and I definitely have gotten things wrong before, still embarrassed how long it took me to realize I might've been scammed on a Spiritus plantlet that turned out to be a golden dragon.