Just realized that this was the BVG section and not the BGS. Go with PSA. The nitch with BGS is the modern market and PSA is primarily vintage. Common sense alone tells you that if one grades one area more than the other, they are more apt to be better in that area than the other.
Out of the big three, BVG is not the best when it comes to vintage cards. Still good but third out of the big three. Take a look at any major auction house, where most of the product listed is vintage cards, and you'll realize quickly that maybe 5%, at most, of their graded cards are graded by BVG. That alone should tell you something as to how the vintage world views them in relation to the other two. You'll typically see PSA as the best for vintage from post-war up to 1980-90 and SGC for anything pre-war.
Out of the big three, BVG is not the best when it comes to vintage cards. Still good but third out of the big three. Take a look at any major auction house, where most of the product listed is vintage cards, and you'll realize quickly that maybe 5%, at most, of their graded cards are graded by BVG. That alone should tell you something as to how the vintage world views them in relation to the other two. You'll typically see PSA as the best for vintage from post-war up to 1980-90 and SGC for anything pre-war.