Besides the spoon differences, there are some differences in the blades as well.

No 4.5 in the Mor-Tac lineup ... it's far and away my fave blade size and am extremely happy to get it again. Just the right size to feel the thump, even for those that don't fish a lot without providing too much lift.

The one plus to Mar-tac compnents is that the diamter of the interior of the 4 and 5 bodies is a little bigger that allows for easier powder-coating and the subsequent drilling we do to clear each end