Is OP even remotely suggesting there is conflicting advice. ?...did i miss something ?
For me, SB is interesting, its style (Imho) is of an enthusiast wirh years of accumulated knowledge and skill. As YS says, its perhaps dated, but its written well, you enjoy reading it (I do anyway)
Parktools would be the exact opposite,, factual, almost corporate. ?.but very useful and up to date. I dont enjoy reading it, its just a reference, a tool.
Best ? Both are, depends on what you want.