Are the gen2 triggers only in the RDP version?

What are the real differences between the Gen1 and Gen2?

Just picked up an OSP model and wasn't even aware there was a Gen1 and a Gen2 trigger.

News to me too.  I also have the OSP.

Other than being a little heavier than I'm used go I don't know what would be wrong with the Gen 1 trigger.

It appears all models built after January 2021 have the Gen 2 trigger fwiw.

Ours has the gen 2 then.

I have both a RDP and a regular (non-OSP) Hellcat that both have the Gen2 trigger.  Both have BA serial number prefixes while my older FDE OSP has the Gen1 trigger and a BY serial number prefix.  

I shot my Hellcat OSP for the first time this week and also shot my brothers Hellcat (non-OSP).  FWIW, he bought his about six weeks before I bought mine.  I bought mine on 19 April '21.
The trigger on mine is worlds better than his.  His stacks with a longer take up and longer rest than mine.  I'd say (subjectively) that mine is 1/2 the weight of his.  The serial number on mine has a BA prefix.  I'm going to ask him what his is.
ETA: brother's is BY prefix.