Kawasaki Ultra 310X SE vs Sea-Doo RXT X 300: 5-year value retention (80% vs 79%), resale value, and cost of ownership head-to-head. Kawasaki Ultra 310X SE holds its value better.
On five-year value retention the Kawasaki Ultra 310X SE comes out ahead, holding about 80% of its value versus 79% for the Sea-Doo RXT X 300. Over the first five years the Kawasaki Ultra 310X SE loses roughly $3,097 while the Sea-Doo RXT X 300 loses about $3,323 — a gap near $226.
First-year drop is the biggest factor: the Kawasaki Ultra 310X SE sheds about 4% in year one versus 4% for the Sea-Doo RXT X 300. If you buy used, the steeper early drop is what the original owner absorbs.
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