The Panthers logo looks downright scary, let's just be clear on that. The Penguins logo makes an attempt at looking mean but it's feeble at best. I don't think it should be carrying a hockey stick and wearing old-fashioned gloves. I also think the secondary logo would be an improvement, which it was for a time until the Pens returned to this one.
A Panther could eat a Penguin for lunch without even trying that hard.
Both logos depict their namesake well without bothering to indicate the home town. It's not necessary for the Panthers, but it wouldn't hurt the Penguins. Now if the penguin could just put that annoying stick down we'd all be better off. The Panthers logo engages in quite a bit of minutia and it would be nice if they had a simpler version of the cat. Failing that, it's still a winner. The Panthers logo should be around for a long time. It's become a great hockey symbol in its 14 years.