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Old vs New Style Dies

I have a set of "old" style Dillon dies in 44 Mag. and am wondering what the difference is between the Old style and the New Style Dillon Dies? Thanks.

On size die, only difference is the design of the decapping assembly.

On the seat and crimp dies, old dies are one-piece machining; seat die has a threaded bullet seat stem, with interchangable seat stems.

New style dies have the die interior separate from the threaded outer portion, easily removable for cleaning without unscrewing the die from the toolhead;

seat die has a reversable seat stem held in by a cross pin. Seat depth is adjusted by threading the die up or down, no longer a two-step adjustment.

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