from my experience, the sgs with the large pickguard usually have the rounded 50s profile. my 04 standard doesi have one of these. Very comfortable rounded neck!. I wish they made an SG with this neck. It is very close to an R9 neck
that's my issue. i can't stand the large pg SG's. I hate the bat look of it. i usually remove the pickguard as i like to have more space between the strings and body for my non picking fingers to have a place to sit. Can't do that with those as that's how the pickups are mountedfrom my experience, the sgs with the large pickguard usually have the rounded 50s profile. my 04 standard does
the small pickguards usually have the 60s slim/wide boards