Kawasaki STX 15F vs Sea-Doo GTI SE 155: 5-year value retention (80% vs 80%), resale value, and cost of ownership head-to-head. Kawasaki STX 15F holds its value better.
On five-year value retention the Kawasaki STX 15F comes out ahead, holding about 80% of its value versus 80% for the Sea-Doo GTI SE 155. Over the first five years the Kawasaki STX 15F loses roughly $1,902 while the Sea-Doo GTI SE 155 loses about $2,196 — a gap near $294.
First-year drop is the biggest factor: the Kawasaki STX 15F sheds about 4% in year one versus 4% for the Sea-Doo GTI SE 155. If you buy used, the steeper early drop is what the original owner absorbs.
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