Falcon Pro 250 upgrade video transmitter


Hello guys,
Could you recommend any replacement for Video Transmitter for Falcon 250?

This one should work well: https://www.unmannedtechshop.co.uk/tx526-40ch-25-200-600mw-video-transmitter/

What are the key characteristic of a video transmitter?
For example, Eachine got:
TX801 and TX526
The power output is the same (expect first got different steps)
First receiver got more Channels count, but does it really matters?