Those colours are the same, believe or not.You might be right about the finish corresponding to the year buy honestly I looked at your link and that is not the finish I once had on the Fender P bass I bought brand new in 1981.
Here is the link to what I'm talking about, this is definitely the finish that was on the Precision bass I bought brand new, now unless Chicago Music Exchange is mistaken and calling this finish on this bass the wrong color but the finish on this bass is the finish that was on the bass I bought in '81:
[Invalid or Expired Link Removed]
And it is also the only possible colour because it is the only solid red finish used at that time.
Fender stopped finishing Dakota red in the late 60s