Raspberry pi zero and latency

Curious, does anyone experience latency when using a Pi Zero versus a Pi 3 B or any other Pi model? Switched from a 3b to a zero to shave off weight and notice that not only video but some telemetry info such as compass is delayed significantly. Its connected to a Pixhawk just for telem no RC and an ALFA AWUS036NHA card

The Pi Zero has much less processing power than the Pi3.
How many MBit/s are you trying to stream at ? I’m sure I read somewhere that you can achieve 6-8 MBit/s with a Pi Zero, but not much more.