I did some digging into the files, I found two entries that I found interesting.
R_73__AA_11_Archer____Infra_Red = {"clsid": "{FBC29BFE-3D24-4C64-B81D-941239D12249}", "name": "R-73 (AA-11 Archer) - Infra Red", "weight": 110}
*R_73__AA_11_Archer____Infra_Red_ = {"clsid": "{CBC29BFE-3D24-4C64-B81D-941239D12249}", "name": "R-73 (AA-11 Archer) - Infra Red", "weight": 110}
R_77__AA_12_Adder____Active_Rdr = {"clsid": "{B4C01D60-A8A3-4237-BD72-CA7655BC0FE9}", "name": "R-77 (AA-12 Adder) - Active Rdr", "weight": 175}
*R_77__AA_12_Adder____Active_Rdr_ = {"clsid": "{B4C01D60-A8A3-4237-BD72-CA7655BC0FEC}", "name": "R-77 (AA-12 Adder) - Active Rdr", "weight": 250}
These are the CLSIDs for the base game R-73 & 77 and the new ones are represented with an asterisk
I tested the gimbals and range, they're pretty much identical it does give weird hardpoints that either clip into things float or are redundant A2G hard points
TaxDollarsAtWork's post in R-73L in game Encyclopedia was marked as the answer