Hello Chris,
The 94 inside the calipers is the production year.
Easy way to tell if they are front or rear :
Look the pistons 4 same diameter pistons = rear
2 pair of pistons (1 pair per side) = front
Also if I see correctly the script "Porsche" is decal applied not cast of the caliper correct ? These is much more 944S2/968 rear calipers.
FYI : Marco with TBO WBX bug has used 4 rear 996 calipers all around with success.
Good luck