This certainly is confusing as there are two speedster models as Foster was saying.
I have seen the speedster SK up close, and there is no difference until you look under the hood. The SK has the smaller 85HP engines, the decals across the bow should say 'Speedster SK', but its not uncommon for owners to remove the "SK" as this is what ive seen. I do believe the SK came out in 99' only though, I might be mistaken. I also think the SK has the bow cover, which gives the boat a really sporty look. If your still in doubt post up the HIN, and I'll confirm the model and year.