I don't know anything about Pandacoin.
Avoid the scams. Avoid any newish PoS.
My .02
Dogecoin is not that new and like I said I will be holding for many years. I'm up in the air about pandacoin but from what I have read they seem promising.
Anybody else have .02 cents they would like to add?
Dogecoin. Pandacoin has gone pretty shady over the months. Not to mention, it did become inactive for a little while, strangely.
I'd take Dogecoin any day. It's a nice, hype coin and it has a good community which is rare when it comes to coins of that nature. It picks up after a Pump N' Dump easily. I've invested in it a few times and got a pretty good return, and mostly, it was because it was speedy.
However, if you are choosing between Dogecoin and Panda, I think you'd do best splitting it down the middle... 50/50.
Pandacoin is shady, but, it's community does protect each other from useless FUD and Dogecoin is also good and just has more opportunities than Panda, due to it becoming a meme.
Whatever you do, absolutely DO NOT go into any of the rare coins, such as 42, 62, etc. Also I'd advise going into one with a active community, too.
Hope this helped, OP.
But then again - it's your investment. So if neither of these work for you just go crazy with it.
(My .000002
BTC)