They're all closely related. Three of them are almost identical with a handful of different component values between them, in fact the originals use the same PCB for all three of those. (Too much for a toggle switch, however)
As always though, I felt it made more sense to give each one their own separate layouts than do the "omit this, replace that, jumper this" dance...
The other two aren't quite as close, but still definitely the same DNA.