I assumed you just wanted an opinion on the two models...
The blitz was great on all counts... It was little tricky to tune in at first but not as bad as the HKS. I really loved how the boost controlled the waste gates, I reached peak boost really fast and didn't have any boost spikes after it was tuned in. I know the ID III is the older version but I should think that the newer blitz products would be about the same. I mounted the HKS in the stock clock location and to be honest it would be better to just leave the clock and hide it somewhere... It attracts attention. Also for some reason when I installed the HKS per the instructions i was getting very erratic boost response... I chalked it up as venturi effect and changed it around a little bit. I had to drill a hole in the passenger side charge pipe coming of the turbo for the boost sensor. I picked that spot so the controller would have first dibs on what the engine was getting or was going to get... The directions say to put it as close to the throttle body as possible but like I said I was getting some funky boost spikes and or low boost with the same settings.
Out of the three controllers I have had experience with I would rate them 1 Blitz
2 Greddy
3 HKS If you pick the hks make sure you lower the settings down before you go drive... If i remember right all the settings in percentage's were set to 70% and the actual boost setting was set at 11psi... When I started the car and went for the first drive with these settings the car took off like a rocket and the boost controller was saying it had just seen 23psi... Not good. So just lower things down before hand and play with it from there...
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Sorry so long...
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