Ah. Correct. I had assumed Wren and Cuff TFR.
Well the Sovtek TFR can be truly epic pedals. Their gain and level of bass/tonal range are amazing but they are often very expensive. Also there are lot of variation from pedal to pedal due to their age and the variability of the components. The Russians bought whatever was available and cheap to build these. If you have a couple of actual TFR I doubt you will like the current Bass Muff. You might want to look at a Stomp Under Foot green Russian. It matched tone for tone a very good sounding Sovtek Bubble Font I use to own. It does not quite match a TFR that being said and that's not the builder's intent.
I have tested the other modern pedal you list Musket/Grey Stache... and they don't quite match a good sounding TFR, nothing does IMHO. Your closet match would be the SUF Green Muff, again in my opinion.