For one thing the 2452H-SL is an "8 ohm" diaphragm and the 2445J's I have had "16 ohm" diaphragms in them...
I've been asked by several people what I would sell these for whole rather than part them out. I honestly don't know right now. All the drivers are fresh as are the charge-coupled bi-amp only networks so they do have some value. I guess I'll decide after I try the last generation 4345 cc networks, along with fresh 2122H's.
I do know that it is highly unlikely that I will have room for them in the near future. I'm fast running out of space and am going to have to switch several rooms around, none of which are very hospitable to large loudspeaker systems.