I actually think that the hull of the older model looks a bit nicer (I've got one with the older hull construction). As the colors of the boat can be customized to whatever liking, I'm not going to comment on that.
But, with Goldfish, it's all about performance. They say this new hull is a couple of knots faster than the old one. Mine is around 58 knots top, this one should reach 61 knots. Goldfish also says the new hull acts like a 30 foot boat in the sea thereby handling waves even better than the older version - which is saying a lot!