Not in any way a fungi expert, but I've just been looking into these as they are common on the coast live oaks by my home. I think these two are commonly confused. Here's a bit on the CA Fungi website: http://www.mykoweb.com/CAF/species/Annulohypoxylon_thouarsianum.html
Jennifer Rycenga
2015-12-00
Sat Dec 19 2015 10:58:10 GMT-0800 (PST)
United States of America, California, 13830 Skyline Blvd, Redwood City, CA, US