worth the upgrade?

[junji98]

i was just wondering how much improvement in terms of picture quality (better color and contrast) i can expect if i change my pentax s4i to a nikon 5200 . the nikon is a tad bigger and of course has 5MP, but will it take significantly clearer and better pics? i love the s4i, only thing is the photos seem to be a bit dull (this is compared to my fz20). will it be a good upgrade of my portable camera or will the picture quality be relatively the same? thanks!