Thick INFI, if you look at the BB13 and HOGB8LE. But the INFI Dog Soldier was thin-ish INFI, with black Res-C.
IIRC, when the BB13s were originally released, the INFI version was only available with tan handles because they were thicker, and they didn't have any black handles that would fit the thicker blanks. On the other hand, tan doesn't necessarily mean thick or INFI, because both Chop House versions ("Thick Cut" and "Lean Cut") were only offered in tan, and they were SR101.
My guess would be that they had some thick INFI BB13 blanks left over, and the tan handles are the only ones they have that fit.