you know all same character but just different actors and writers with different view on the characters. the child robert was different to teen robert and adult robert different but all same person at heart as he change and evolve over time.
Sorta true sorta not Robert still was rob in 2014 15 it was afterwards in the macload era he was massively change and Iain clearly didn’t know how to write Robert characters which is why they strip and took a lot of what made him tick away and had a personality change/ superssion