few possition reported?

FlightAware ADS-B Flight Tracking
2

Do you have one antenna for everything or one for each setup. So one FR24 antenna, one for PF etc…

How is your range?
Do you have Virtual Radar Server(VRS)? If you run VRS you can compare the range of your setups.

Check out these posts

http://discussions.flightaware.com/ads-b-flight-tracking-f21/poor-stats-on-ff-box-as-compared-to-radarcape-t20809.html

http://discussions.flightaware.com/ads-b-flight-tracking-f21/fr24-and-flightaware-stat-comparison-t24640.html