I now have both T3 and FW systems (and BRB900), so I will chime in even though the OP made his decision.
Yes, they will both find your rocket, kinda like a Corvette and Camry will both get you to the grocery store. You need to understand what you are getting for the huge price difference. Anecdotes like "I flew my tracker to 10,000 feet, it landed a mile away, and I walked right to it" are not really meaningful, since every 900 MHz tracker has successfully done this for 10+ years.
I bought the FW for data and innovation. If you want to geek out over dBs, high speed sampling rates, and downloads, then this is the unit for you. Also, lots of emphasis on communicating with other trackers. Yes, it comes with a dedicated Bluetooth app for iOS, but it scares the hell out of me, to be honest. The app is in constant development/remediation, as evidenced by all the threads in this forum. I do worry that it will freak out on me one of these days. Kevin and Adrian are active members here, so that is comforting.
The T3 will find your rocket with standard NMEA strings. There are 3, no-cost, Android apps that you can pair to it via Bluetooth. Two of them have mapping features. Yes, these 3 apps are wonky, but odds are one of them will work for you. You can also Bluetooth to a COM port and a terminal program on a laptop base station - no Android required. I think the T3 is a good balance of cost and features.
However, if I absolutely, positively need to find the rocket, I still revert to my trusty BRB900. In these scenarios, I don't trust Bluetooth connections and don't give a damn about maps or arrows to point me. I'll worry about that later. I just reliably need the latitude and longitude coordinates and the BRB900 delivers that with its dedicated receiver unit.