The original Colt Pony was made using the Star DK slide and parts with a Colt made frame (to Star specs). Colt made some changes to the design when they came out with the Mustang and 380 Govt. models
Here is a link worth reading on the Star D and the Colt version
http://star-firearms.com/firearms/guns/d/index.shtml
The new Llama 380's are copies of the older Llama III/IIIA. I haven't gotten my hands on the Baby Rock, but from photos it does look like the same as the Llama 380.
I forgot what year it was that Llama changed the III/IIIA from lock breech to blowback. I have a IIIA and mine in blowback.
Here is a link worth reading on the Star D and the Colt version
http://star-firearms.com/firearms/guns/d/index.shtml
The new Llama 380's are copies of the older Llama III/IIIA. I haven't gotten my hands on the Baby Rock, but from photos it does look like the same as the Llama 380.
I forgot what year it was that Llama changed the III/IIIA from lock breech to blowback. I have a IIIA and mine in blowback.