Keeping in mind I think I am a crappy target shooter (no patience) I think they are identical in accuracy.
The 405 noticeably heavier at the front and distinctly more effort to cock.
The 405 casts an arrow a whole lot faster and flatter. Consequently, you'll have to rethink your zero.
The 405 does not seem to be hard on servings (my latches are polished).
The 405 should not be shot at foam targets at 20 yards because they bury so deep there's not much to grip.
I have all three Matrix bows and I see a division in power class. The 380 and the 405 on one and the more reasonable 355 on the other side. Cocking with a rope cocker aside you can't go wrong with any Matrix bow, let alone any Excalibur for that mater.
If you're looking at the 405 think real hard about a C2.
The more targets you shoot the lower down the power scale you should go.
The 405 is not a fun bow, it's a hard core hunting rig. It's a matter of want not need.
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