Persona 4 Golden is interesting because not only was it land locked onto the vita but some changes happened with the localization resulting in new voice actors.

I can't really express how indifferent I was to the addition of Marie. Initially I didn't care for her but over time I liked her (especially in Japanese, the poem thing makes more sense in Japanese).

Music:
Shadow World is one of the best tracks in all of Atlus music history and I think this is the most important contribution to Persona legacy that P4G affords us. If there are other additional tracks I don't remember them.

Art:
I can't say it evolved versus the original release, but it looked nice on my vita.

Gameplay:
Still a relatively easy game, whenever I got into a kerfuffle I was able to circumnavigate with ease. I belive the battle system does a lot of hand holding which is favorable if you are new to Tensei.

Plot:
The plot of the game is sick and twisted, I like the seriousness of a town-wide murder spree being juxtaposed with a hot spring trip. Overall I would say the themes don't feel as strong or sincere as P1,2,3 but are nice all the same (because this game originates Shadow World).

Overall I wish this game had a story that resonated with me more.