This has been confusing for a long time and I don't know why they would do that.
But if you kind of push the code letters a side there are 3 versions.
The F75 standard, original what ever they call it, it only had the DE, JE, BC and the PF processors.
Then came along the F75, se, Ltd, and as best as I can tell there were 2 versions of it the all black and the camouflage color and this version they added the BP and CL processors.
Then the latest add to the mess is the F75Ltd 2 I haven't seen one so I am not sure it could have some SE on it or the box some place. Now as I said I haven't seen one but I think the detector is all black. On this version they add the FA processor and the DST to help with EMI, along with that they keep the old non-DST format so if you didn't have EMI problems you could switch and run it with DST off.
I didn't count the upgrade as a version, I think that was intended to the first two versions up to the latest DST version. But that didn't seem to work out real well, lots of un-happy people.
So from what I can tell that is what is out there.
Ron in WV