I think Galbraiths interpretation of Bach is fantastic, similar to Williams in its rhythmic intensity, but it has added nuance and subtlety, not to mention that incredible guitar! Frankly, I think its difficult to improve on Gary Ryans Bach :
Unfortunately, there are only these snippets on youtube for us to enjoy, but ive heard him play whole suites live and they are just as refined and polished.
My issue with Williams these days is this. Say if you took two greats of the violin world, Vengerov and Pearlman for example, got a panel of musicians together to compare recordings of them playing the same piece, I think its fair to say some people on would prefer one over the other, but all would agree both are equal in musical merit, all that separates them is personal preference. However, if you took a recording of Williams playing and compared to lets say Galbraith, I reckon an educated audience would recognise the interpretive and musical prowess over Galbraith over Williams, even though both players are equal in technical ability. I also reckon Williams has the knowledge and interpretive skills of his peers, he just doesnt exude this as much for some reason. BTW i dont mean any of this too literally, its a way of me conveying my feelings about his playing, pure opinion!
Enjoy Garys stunning playing!