I recently changed my older cat to Purina, he too is a daily vomiter, I actually found the sensitive stomach one worse than the others, but of course it is really hard to tell as it could have been a pure coincident that he vomited straight after it, as he does with other food too, however he loves the Senior one and weight management one, i think he is doing well on it, but yes he still has the vomits, my vet told me she has a cat just like him, and nothing she tried or did made an ounce of difference, some cats are just like that, Ash has had his blood tests etc done and is fine otherwise.

I think it would not hurt to give it a go though, each cat is different, i know he loves the taste of them, i have completely got him off wet food apart from some red meat now and then, and he is a happy boy.