Are you sure you haven't accidentally changed the traffic filtering options? Run the 740 side-by-side with the Android device, and check the following:
Menu > Setup > Alerts and Warnings > Traffic Alerts. (Don't just stop when you see "Traffic Alerts (Enabled)" on both devices--click that option so that you get into the detailed settings page.)
"Enable Traffic Alerts" at the top controls whether iFly will pop up an alert when it thinks you're getting too close to traffic, but otherwise has no effect on whether traffic targets are displayed on the map. Similarly, the "Set Alert Thresholds" in the middle of the menu adjust the "Caution" limits that cause targets to change from blue to yellow and pop up Caution alerts, but otherwise have no effect on whether trafffic targets show up on the map.
The two settings at the bottom of the menu ("Distance Visibility" and "Vertical Clearance Visibility") affect whether traffic appears on the map. Set both of those to "Unlimited" to see ALL targets, or adjust as desired to filter out targets you don't want to see (like airliners flying at FL360). If you change these settings on the 740 to match your Android device, then you should expect to see the same traffic targets on both devices when both are connected to your Stratux.