They are both tube amps, which with my speakers at 105db sensitivity mold the sound to different parameters.
For Heaven's sake don't fall for that tube amp nonsense. With the best solid state amps, that have a very low output impedance you can choose any amp you want. Tube amps have output transformers and so they have a significant output impedance and so they will tend to have their FR follow the output impedance curve of the speaker it is connected to. That is bad and yes, tube amps will be affected by the speakers they are connected to.
But it gets worse. In the heyday of tube amps speakers were generally 16 ohms. and so the output transformer resistance of the tube amps was a much lower percentage of the prevailing speakers.
However, solid state amps are essentially current amplifying devices and don't like to produce the high voltages that 16 ohm speakers would require. That would cause arcing across the PNP and NPN junctions in output transistors, which would punch a hole in the semiconductor material and destroy the device.
So 8 ohm and actually 4 ohm loads are the order of the day in this era. Actually if you look at speaker impedance curves, I would say more speakers than not actually dip to four ohms or less. That is my main beef against receivers, that are not four ohm rated, as you can't get a power transformer or power transistors of the required size stuffed into a receiver box. That is why you have to be gentle with receiver volume settings.
So my strong advice is to forget tube amps, get a good solid state amp, and then you can pick the speaker you like best and not have to worry.
The bottom line is that, whatever the talking heads say, even the most costly tube amps are inferior and less fit for purpose than good solid state amps.
That is the truth. So banish all this audiophoolery someone has filled your brain with.
