I agree with cal's assessment. I believe that Psvane is aiming to replicate what might be called the traditional/classic Western Electric character which is highly sought after by many.
Some would describe the EML sound as 'modern'/extended (less soft). I believe there is much merit to that but I do find the EML XLS to be also very engaging and maintains an organic character (at least In my system anyway). My Takasukis were very organic and also had excellent extension at the frequency ends.
Charles