casio fx 991ex vs 991es plus

Firstly, the fx-991EX has a larger, 12-digit display, while the fx-991ES has a 10-digit display. tecos fc vs mexicali Additionally, the fx-991EX has a range of advanced functions and features, such as a solver function, a matrix and vector function, and a statistical function, that are not found on the fx-991ES. am vs pm