Easier/Better option? Buying original figures or 25th ann. figures?

[Jukka]

Hello.

Long-time lurker Jukka here.

I recently have been getting on a TMNT kick and trying to get back into some of it. So I have plenty questions on many topics.

Wanted to ask, is there any notable differences between original Playmate Turtles toy-figures VS the 25th Ann. versions of them?
(I know for example that the MOTU Commemorative figures were different from originals, but don't know about them Turtles..)

Also, depending which is better to acquire... I wouldn't mind tips on where to begin looking.

(As a kid, I had all four turtles, blimp, sewer, van and more. But as I grew up, I had to sell them or give away to other kids, so now years later I'd like to atleast get some of the main guys in my collection. Oh, and at some point the Classics versions cause I'm a big cartoon-fan)