So the impedance curves on the TAE are actually a combination of switches or do they follow a real Impedance curve? What input impedance are you using for the RL? The first version should be fed to 50K minimum. The RLIR can feed anything and preferably 10K or lower but never Mic level for either. The best way to compare is to use a line out box and a real cab, then compare that to the RL. Otherwise there is no baseline and one seasoning is applied on top of another. An impedance curve can hype the high end making a dull amp sound better giving you a false sense of what is better. Need Terra Firma or it’s pissing in the wind.