No, we are pretty different, first with using different software. EFILive offers a much larger suite of tables for changes, which is why we can tune for modifications. Most CMR tuners will not tune for anything above an intake swap. EFILive also allows for tuning of the new 6 and 8spds.
With over 10,000 vehicles tuned, most inperson and quite a few on load bearing dynos, we have a solid grasp on GM vehicles and their nuances. We have tuned from mild to wild setups, with all of our personal vehicles having heavy modifications done to them as well.
You are correct, we do not charge for tune updates.
We have quite a few customers who have switched over from other tuners/handhelds, happy to share those results if you shoot us an email.