They all look like Arapawa rams to me. They look like they are rising 2yos from size and horn growth, but you'd need to check their teeth
My Pitts and PittX were all jet black with little white on their heads, their faces and bodies are a different shape.
The wool type is different too, staple lengths are similar but the fibre is coarser and feels different to handle, it doesn't have the bounce which the Arapawa wool has either - speaking as a spinner of wool with some expertise!
Photos are a couple of my Pitt Island sheep with some of my Arapawas behind them, and one of our 3 young rams.
The 2 young rams at the front [from left] were born mid October & mid September 2017, the one at the back was born mid September 2016 to give you some idea of horn growth. This photo was taken in early June this year, they have more horn growth now.
Breeding & training quality Spanish horses - THE horse of Kings! Also breeding Arapawa & Pitt Island sheep.