The Pass amps do take some break in time before sounding their best. The INT-25 is a lovely sounding amp but it does lack a little bit of "grunt" for want of a better word. I don't know the Wilentson amp but, based on listening to similarly specified tube amplfiers, I could see how certain aspects of the sound might appeal relative to the Pass.
Pass INT-25 better than Wilsenton R8?
I have recently purchased a Pass Labs INT-25. It replaced a Wilsenton R8 with NOS tubes (EL-34). I feel that the sound im getting from the Pass is not 5000.00 better. Has anyone purchased a INT-25 and not been blown away from the sound? I do think that the 25 has a wider soundstage.