I have had a loaned pair of the Sophia “mesh plate “ in my SET mono blocks. I also have had the EML 300b mesh tube. Different construction between them. The Sophia is actually a perforated metal plate. The EML is a genuine mesh filament. I hope that you are able to experience the EML mesh and see what you think. Warning, the amplifier has to be 25 watts dissipation or less for the delicate mesh filament.
Charles