A wider platform without a longer water line length is also more prone to pitch polling! However, this is splitting hairs in this instance. Also, a slightly narrower beam will raise the windward hull sooner reducing wetted hull area/drag and I also think narrower Cats like the Stealth R point higher than the Stealth F16 but there's no real proof of this occurance. Therefore, you have a couple of years to consider the pro's and con's