I think that has more to do with the antenna of the gateway .
I also think bad antennas just ‘still work’, and that LoRa is just so good at retrieving the signal from all the noise. E.g. on a good day I can get around 12km range between my gateway with @lex_ph2lb DIY GPA antenna and a rubber ducky from Aliexpress on my node. The GPA has no gain and the rubber ducky probably only has loss, and is also probably meant for 900MHz.
Testing with the Sunhans 13dbi and the ‘grey tube’ 10dbi from Aliexpress doesn’t give significantly different results.
I have ordered the CXL 900-3LW-NB/868 MHz and want to do some RSSI testing comparing this one to several Aliexpress antennas, but I haven’t found time to do it yet. Anyone is free to give a helping hand (Ghent region) .