If only ever going to use a tune for the stock turbo...I say use either. But if your 2008's engine is the 2.0t FSI-EA113, and you may be thinking to try a K04 one day, then I would suggest you select only Unitronic. I say this because Unitronic has a K04 tune for the 2.0t FSI-EA113 and IE doesn't. Typically, you get a deal when doing a tune upgrade with the same tuner and this will save you $$$ down the road. Both Uni and Ie have a K04 tune for the 2.0t TSI-EA888. I can add that mine, when GIAC stage 1 tuned, was beating APR stage 2 cars at the 1/4mi track...mine with just a drop-in OE location performance air filter and APR stage 2 has intake and down-pipe or full turbo-back. It is now GIAC High Output K04 tuned. Authorized dealer location in relation to your location is key. If you have a United Motorsport authorized tuner/dealer nearby...you may think to be tuned by them. So to have it tuned to the most efficient performance per your car, rather than a shelf tune meant to work well with any car.