The EyeVec R1 and R2 have the same form factor, but different internals. The main differences are:
-
Maximum frame rate: 500Hz for the R1, 1kHz for the R2.
-
Camera sensitivity: the R2 has a more sensitive camera than the R1. This yields a better gaze estimation precision.
-
Camera lens: 16mm for the R1 and 25mm for the R2. This also affects recommended focus distance.
See detailed specifications below.