Now, boys and girls, can we all play nicely please?
Let me clarify a few things:
1) As has been said, no-one here has yet heard the F1 and all that is being said is simply speculation. Time will tell how the market takes to the F1.
2) It is likely that the F1 will have a
slightly different tone to the LMII. It is true to say that if that's the difference between nearly the tone you want and the actual tone you want then it's hard to put a value on that.
3) I am guessing (speculating - I do not know, nor does anyone else yet) that most people will choose between the F1 and LMII based on either size or price factors more so than sound (assuming they've narrowed their selection down to one or other of these amps and eliminated any competitor amps). Some people will say I'm talking out my @rse, but this is just my opinion - and just like @rseholes, everyone's got one! There may be gear heads on here who wouldn't understand any decision that wasn't based 100% on the sound, but we're talking about the
mainstream and the majority who
may be less discerning about the power amp differences than others.