Evening me lord

£4.80 for the complete edition on the PS Store

I believe the Marvel Edition is the base game along with the Marvel DLC which costs £4 https://store.playstation.com/#!/en-gb/games/addons/marvel-arcade-pack/cid=EP9000-PCSF00021_00-LBPDLCMARVVB0001

Either way it's worth noting that the £4.80 is a temporary sale price, so even if it is a better price at time of writing, it won't last long, and it's digital- takes up more drive space.
However, there's also a physical version of the marvel edition which could potentially be even better if that's your reasoning for buying the more expensive physical version.
However (this is really back-and-forth) if you buy the digital version you'll be able to use the costumes with the PS3 version, but it's not confirmed you'll get the same benefit if you buy the physical marvel edition.

Also it needs to be said that's it's definitely not the "complete edition"... far from it. There's a lot more expensive DLC where that came from.

Edit: Here's original source confirming it comes with the original game and explaining what else it comes with: http://blog.eu.playstation.com/2014/09/11/littlebigplanet-playstation-vita-marvel-super-hero-edition-launches-november/

...basically, buy this only if you're the kind of person that is happy to just play the base game. For completionists like me, **** it all. :neutral_face: