The Para LDA has a triple safety. The hand grip must be depressed to pull the trigger. The slide safety has to be manually switched to pull the trigger. And finally the internal safety disconnects the firing pin (unless the trigger is pulled) and this prevents a discharge if the weapon is dropped. Also the LDA has a true DA trigger with a very long pull like a revolver. It is unlike the DA on other semiautos.
Paraord’s LDA hammer is partially cocked too. If you don’t believe it, try inserting a dead cartridge (on the range, keep it pointed in a safe direction etc!), and then pull the trigger twice. I agree they have the dissimilar safety setup, and are thus different from the others that way.
Daewoo pistols have a partially cocked safety.
I like the ParaOrd designs a lot. I have small to medium hands, and the double stack isn’t good for me, but their LTC in particular works for me very well.