....First of all allow me to state my credentials. I'm African-American, and I am a Musician/Entertainer. That doesn't guarantee I'm an expert, I know if this were an Italian entertainer speaking on Opera, I'd consider it a good starting point.
....Now, everyone has a pretty good idea of Soul, my task is to dance on that thin line separating it from Funk. Although soul music as a genre, and element of art is to primarily a "Black thing", It is not soley the province of Black People. Any art is to some degree the expression of the soul of an artists' soul through their chosen media. In music Blacks may have an advantage but there are many exceptions. For eexample right now, I believe to of the greatest soul singers at present, are Joss Stone and Pink.Both White woman. One of my all time favorite funky musicians, is Bonnie Raitt.
....Now for the fun.I think Funk as compared to soul is a step deeper in baring the soul, and done with raw feeling and simplicity in expresion.
.....To kick it off I'll give a few examples for discernment:
.....Blood .Sweat & Tears, are soulful...Creedence Clearwater Rivival is Funky. Earth, Wind, and Fire, are soulfull, Ohio Players are Funky. James Brown, is soulful, Dyke & The Blazers, are funky.
.....This should get you started. I'll return later. Oh..remember, this can only be opinion. There can be no absolute right and wrong.