I have MTM, Frankford Arsenal, Berry's & Dillon.
The FA boxes are brittle.
They seem to break easier than any of the others.
The Berry's boxes seem to be a bit more malleable or softer.
The Dillon boxes cannot be seen through.
Although that same argument can be used on some MTM boxes as well.
I personally like the MTM see through boxes for .32H&R, 9mm, 38spl, 357mag & 44spl&mag.
They don't make 'em quite big enough for 45 Colt.
The rounds don't sit down in the box unless you force 'em in.
(especially the holes around the outside edges.)
For 45 Colt, I like the Berry's boxes the best.