If there is a difference it is that the Sol ro focus items only increase stats/hp of each pet to the stats/hp of the pet above them with no extra increases to damage and no hp increase for earth pet. The raid focus items increase ALL pets hp add +1 level to pet and add +2 attack(unsure what that means)
I am basing this from:
http://www.magecompendium.com/pets-f...s-library.html