Hal and Andreas
I'm very familier with Ilford FB WT. To my eye the image color is not the same as Forte PWT or Bergger WT. PWT easily toned to a chocolate yet was flexible to cool off in KRST. If the Adox emulsion on a white paper base can be toned slightly cooler than Ilford WT I'll be happy. Andreas comment on tonability is a positive.
Hals comments are interesting. I also use LPD, 130, or sometimes Arista Premium vs Dektol. LPD is my 130 substitute when working at cooler temps. 130 is sluggish at 20c. Hal, Oriental Warmtone and Fomatone MG Classic 133 are warmer (more yellow) than Ilford WT.
Research indicates contrast steps on Adox Variotone Premium is very similar to Ilford's filtration.
I assume Variotone Premium is OC safe since Freestyle does not specify a red safelight?? Adox Fine Print Vario Classic requires red per Freestyles catalog. I wonder who coats Vario Classic?