Perhaps the figures for the vRS are old (havent been updated for the newer 2.0T TSI engine) and are showing expected figures for the older 2.0T TFSI engine that was used in the pre-facelifted Octy vRS. If you look at the date on the Octy specific webpage it shows "9/2005 onwards" which means that Superchips havent got specific pages/details for the 2 different engines that the Octy vRS has been sold with (i mean the two different 2.0T petrol engines as well - not the diesel).
Having the older design 2.0T TFSI engine in my Golf R, i know that power and torque gains without an upgraded high pressure fuel pump are limited in comparison to the newer TSI engine. This may be the reason for the difference in expected power gains. As the newer 2.0T TSI has a better designed high pressure fuel pump, tuning companies don't have to worry about issues with fuel pressure and can therefore push the tune a bit harder, resulting in more power.
They should realistically have two pages to suit the Octy vRS - one from 2005 - 2009 (or thereabouts) when the pre-facelifted Octy vRS came with the older 2.0T TFSI engine, and another page from 2009-present to suit the current Octy vRS which have the newer 2.0T TSI engine.
Bookmarks