JW,
Be careful with these balls. Both the Tropical Storm & the Tropical Heat will give you snap but on different oil amounts. They are DIFFERENT balls for DIFFERENT purposes.
On dry or very light oil, the Tropical Storm will be skid/snap. But on medium oil, when the Tropical Heat will still be skid/snap, the Tropical Storm will just be skid. On very light oil, the Tropical Heat may not get enough length, depending on drill and your ball speed, to skid/snap. It may just arc.
Again the above is to the average bowler. If you have more speed than revs, thing change. If you have more revs than speed, things change the other way.
Remember you're NOT going to cover dry, light, medium-light and medium oil with the same ball giving the same ball reaction (skid/snap).
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"None are so blind as those who will not see."