Update: I tested the EQT Stage 2 tune back to back with 5150's Stage 2 THOTS tune. The 5150 has far smoother power delivery and feels like its much more usable power. EQT's tune is fairly aggressive in that regard, it feels like the engine is really straining to do its thing. The 5150 tune makes the same power but does it in a way that feels like the car came from the factory this way. Knock is also down to zero on pulls and half as much under regular driving conditions. From what I gather, the THOTS tune is designed for california 91 octane and environment.