Mr16 vs DSC for strobing... The closest you can come with either one is programming in a very short pulse - like one or two frames of on time.
Since both are driven by the same frame rate, the results would be very similar.
As for making custom firmware, you would need RJ's permission since both devices are his design. For what it's worth, the mr16 would probably be easier to program since the PWM is controlled by a well designed 16 channel PWM controller, where on the DSC, you are doing the PWM in your code...
RM