Just going by the pictures...
The one on the top-left has a hammer but no safety, so with only that information, I would assume that it is a P30 Variant 3 (DA/SA with a decocker).
The one on the top-right has a hammer and a manual safety, so with only that information, I assume that it is a P30S (S = manual safety) Variant 3 (DA/SA with decocker and manual safety, with the ability to be carried cocked and locked).
The one on the bottom-left has a bobbed hammer and a manual safety, and it is a long slide version, so with only that information, I assume that it is one of the 500 P30LS LEM models, where it has the LEM trigger, manual safety, and the long slide. This one should be the most rare P30 available since they only made 500, but most people seem to believe a manual safety on an LEM equipped P30 is redundant. H&K only made 500 of these because in order for their shooting team in the US to use the P30LS LEM, it had to be a production model, and in order for it to be considered a production model, at least 500 needed to be sold to the public. It is doubted that H&K will produce this model again.
P30S - S= manual safety
P30L - L= long slide
P30LS - LS= long slide and manual safety
A P30 with a bobbed hammer normally indicates that it is an LEM model.