TURKEYTAIL'S HAIRY COUSIN
There is a very similar species T. pubescens which the books describe as downy rather than hairy and is mainly found on Birch and Beech (there is one record on CATE2 for hirsuta on Beech - so who knows?).
Either way it is probably worth taking a closer look as at a quick glance it could easily pass for versicolor.
PS I can't help wondering why Trametes should be feminine (hirsuta), whilst Stereum should be masculine (hirsutum)?