No, I see a distinct resemblance too. Besides Silverprop mimicking the meteorological reference in the name of the Storm, the externals are very similar as well. I think they are trying to snare the noob market, who only has a vague idea of what the Storm is. They go to a cooling webstore, think "Oh, I wonder if they have that one new uber block everyone on the web is chatting about... what's it called? Monsoon? Tempest? Typhoon? Oh, there it is, Cyclone! Yeah, the one with the 2 barbs and brass and copper base!"
Who wouldn't be confused? Take a look at these 4 waterblocks, and tell me which two look nearly identical:
1 2 3 4
My case rests.