There are quite a bit of other mushrooms with red caps.
You don't ID by color. You ID by all the features of a mushroom: color, texture, cap shape, stem type, spore print, etc. Everything needs to match.
Panthers have dots on the top. The cap it often brown, but sometimes its bleached by the sun and nearly white or yellow, but still a panther. You can tell because of the stem type. No mushroom has dots on top, is the size of the panther, and has the same type of stem.
For example, look at this:
This is NOT the panther. How do I know? Some panthers are this color, and they don't all have dots on top. I know this is not the panther because the stem is not a panther stem. This is Amanita crenulata.
Look here:
No, itβs not A. muscaria. Itβs A. parcivolvata. Muscaria isnβt the only red capped mushroom with dots on it!
Another red capped mushroom that isn't muscaria. It almost looks like it has a few white dots on the top, but doesn't really. They are just imperfect areas on the cap.
What about this:
Is this one A. muscaria? No, it's not A. muscaria. Anyone know what it is? I know. Try to guess.
You may remember me as 69Ron. I was suspended years ago for selling bunk products under false pretenses. I try to sneak back from time to time under different names, but unfortunately, the moderators of the DMT-Nexus are infinitely smarter than I am.
If you see me at the waterpark, please say hello. I'll be the delusional 50 something in the American flag Speedo, oiling up his monster guns while responding to imaginary requests for selfies from invisible teenage girls.