'16 Aprilia RSV4 RF Exhaust Comparison - Competition Werkes GP vs OEM vs Hindle Evolution

As much as I love the Werkes GP, it can be problematic for track sound check. The OEM exhaust is a pig and limits ground clearance so I've fitted a Hindle Evolution (with and without noise reducer). Belly pan will need to be modified as the mid-pipe doesn't clear.
FYI I kept walking away to check a sound meter app on my phone placed 15ft away, however, the results didn't make any sense whatsoever.