Not sure if anyone noticed, but it looks like Casio released two "new" MRGs (7700 and 7600, both 1BJF!). See here for the line-up:
LINE UP - MR-G - ???? - G-SHOCK - CASIO
The change on the 7700 is obvious (gold to silver indices -- which looks better IMHO), but who can spot the differences on the 7600D-1BJF compared to the old 1AJF version?
Seems like Casio is no longer really interested in the MRG line (not sure how to phrase it differently, taking into account this modest "evolution" after about 3 years -- still no successor of the 8100 ).