Can you I.D. these KG/mm springs?

[mrmephistopheles]

Before you look at the pics, I know they're KG/MM S21 S13 springs. I just don't know what flavor they are.

S13

KGMM S21 Sport
front: 3.2 kg/mm | 179.2 lb/in
rear: 2.6 kg/mm | 145.6 lb/in

KGMM S21 SuperSport
front: 4.6 kg/mm | 257.6 lb/in
rear: 3.8 kg/mm | 212.8 lb/in

KGMM S21 Racing
front: 6.6 kg/mm | 369.6 lb/in
rear: 5.2 kg/mm | 291.2 lb/in

CD is included for size reference.

FWIW, my guess is the 'Racing'