COR gets warwolf belt or commodore belt, Alky, Cor bottes +1, which RNG can't wear. RNG gets osode and wyvern helm which COR can't wear. That's 20 STR for COR and 15 STR for RNG. And the COR's substitutes for osode and wyvern helm offer 9 STR (mirke and WS anwig) whereas a RNG substitutes for the unique COR STR gear offers 2 STR (RK belt +1) at best.
Buccaneer's Belt- STR+4
Skadi or Denali feet- STR+3
Skadi hands- STR+5
RNG with anwig, osode, skadi, skadi, buccaneer's: STR+26
COR with anwig, mirke, alky, AF+1, commodore: STR+29
Seems kind of silly to mention alky for COR and not mention Hachiryu pants for RNG, though.
Terraxia - RNG/COR/THF - Midgardsormr/Quetzalcoatl (boxed)
Viper Beam - ARC/CRP - Fabul