BTW, don't take anything I say as fact, it's all just opinion, usually based on observations that are often misleading.
Reason I said what I said about the SRs though is that the SRs aren't affected by the LNB. Ie the LNB being off will bring the signal to your receiver off freq, however the SR will still be right on. The oscillators in your receiver can be off, but since receivers are inside with more constant temp, so you usually don't expect them to be off as much.
However one other thing, showing how confusing comparisons of freq and SR changes can be, some receivers don't seem to care whether the SR or the freq is off, while other receivers need to be very close to the proper parameters. Different receivers seem to behave a lot differently.
I was experimenting with 3 of my receivers just now. My Twinhan 1020a needs to be very close in freq, usually within 2 or 3 MHz on a low SR signal, and 4 or 5 MHz on a high SR signal, whereas my TT3200 can tune a transponder when off by over 20 MHz on a high SR signal. My Genpix will tune when off by about 15 MHz on a high SR signal, but is even tighter than the Twinhan on low SR signals.
Being off in SR is more confusing. I was just playing with my TT3200 and my Genpix, and I was able to get the Genpix to tune almost 400 off on a 29270 SR channel, but my TT3200 wouldn't lock when I was off by only 19. This despite the fact that the 3200 will lock when significantly further off in frequency. The Twinhan was intermediate between the two. On these receivers, until you are near the point where it won't lock, these receivers performed fairly well, whereas my old Fortec Lifetime, would appear to have a good lock, but the picture would break up due to errors, when only off by a small amount on SR.
Another aspect that makes some of these observations unreliable, however is that I have seen occasions where if I lock on a transponder, then slowly increase the SR, I can get it to lock fairly far off the correct value, and yet if I start off on the same wrong value that I was able to lock on when gradually changing SR, it won't lock. So when comparing things, I usually try to tune in a significantly different transponder between each test, so that each test is more independent.
Anyway, in short, these frequency/SR comparisons can lead different people using different receivers into different conclusions, and sometimes the way you do the comparison greatly affects your observations.