There are no specs for the 125cm, but the 110cm says this:
(http://www.neptunsat.com/se/100LH.htm)
Gain (11,5Ghz)
40,8dB
Gain (12,75Ghz)
41,68dB
Comparing that to the Mabo dishes, same size,
with specs that say: (http://mabo.pl/eng/antennae/110os.html)
Yield 11,75 GHz (dB) ... 41,70
Yield...