Re: Lee Anniversary and Lee Breech Lock kit difference
They are basically the same presses. The Anniversary Kit includes the Challenger press. The Breech Lock press simply uses a "quick change" insert to allow die changes in 3-5 seconds rather than the maybe 20 seconds screwing them in normally does. To make it work reqires an insert to be added to every die you have.
Such costly devices seem to be a great solution for a non-problem to many of us. The breech locks may save you a minute in an hour long rifle loading seasion, 20 seconds more for handguns. (There is no need or justification to locking dies in a press with a wrench, hand tight is plenty tight.)