Actually I tried it yesterday, by plugging in the output of a Network Analyzer into the bjt's base (as in the LTSpice schematic) and measured the transfer function in the frequency range. And it was 5.5 dB higher than in LTSpice (41.5 dB vs 47 dB)....
First, I don't understand this discrepancy either since the bias conditions are the same (and the OpAmp gain) and second, with a higher gain I would expect a higher output noise, not lower ???
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I attach the plot with both TFs. The difference it's slightly bigger, closer to 6 dB.