I have a 42 days old doberman pup what would be better for him eukanuba or royal canin?

hi, i use royal caninn for my greatdane and all ways get told how lovely and shiny her coat is, i mix chicken or beef or lamb through the dry food,sometimes raw and some times cooked.ps most vets will recommend royal caninn,but it is not a prescribed dog food,can get it from any good pet produce shop,or pet shop. it comes in puppy and goes up to giant breed.