Hi Brian and Nizar,
As a reference I went and tested my 10.7 MHz ceramic filter connected in both directions and see very little difference (part number SFE10.7MA5-A which is a Murata part number). See attached plot showing both directions tested (the plots are overlayed, and they really fall right on top of each other).
Also note that this ceramic filter input and output impedance is advertised as 330 ohms but it looks like my transformers are presenting an impedance of approximately 280 ohms to the ceramic filter input and output based on measurements I did with my NanoVNA-F when the transformers were connected to a 50 ohm load (should have been 313 ohms based on my transformer turns ratio but my measurements yielded 280 ohms).
Note: the Red marker in my attached plot is at 10.700 MHz and this was indeed the frequency where the response curves were peak.
Just FYI,
Don
