I just tried with the Pollin PLL GM-201 GPSO frequency 25,782051 MHz.
LOF is 10.055 MHz. ZF 435 MHz.
The signal is same Quality , no problem.
PSK beacon 20dB SNR, fine signal.
(PS: my SDR Filter is set to 300 kHz)
I tried a lot of PLL LNB´s. The Pollin PLL GM-201 has the widest range of
PLL Lock, from 9200 - 10050 MHz LOF sure lock and good ZF signal.
I use it with 9200 MHz LOF for 1,2 GHz ZF (23cm)
73´s de Robert