Kanzenshuu people seem to prefer Kai, it is less awkward. It's the same translator people and he's made some better improvements. Don't stick to the original just for the sake of sticking to the original.
Start all over you fool! Haha. While I'm not a master of translation knowledge as far as I can see, it's quite simple. We are concerned with the manga only and Kai cuts out filler, plus Simmons updated some of his translations to better showcase the style of the character. It's a win-win. Plus it's much less work.