Both have their good and bad points/sounds/styles, so just pick the one that suits you best, (My preference would be the Korg as it sounds more alive that the T4)
A lot of owners have both and combine them to get the best of both worlds. (They complement each other excellently)
Neither would temp me from my Wersi Abacus with its Akai /VST integration though.
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).