The AHRS in the Stratux is much better than the one in the iFly, but might still experience some of the lag still. When I test stratux at my desk, they do run smooth, with minimal issues, but there has been reports of the drifting, and needed recalibration. I do have minimal experience with the AstroLink (I have only flown with one once, and did not use the synthetic vision or AHRS, but there are many fantastic reports on its AHRS capabilities. A good analogy for this would be recieving an A and A+ in a college class. The A+ is better, but both give you a 4.0 GPA. I know both devices work great, and there isn't a wrong choice here, but I do want to help you make the educated decision on what would be best for you.