McGuane has significantly more upside than Chubba.
Dont know how you see that Darth Tiger, i reckon Chubbs could play another 2 years as a third defender.
McGuane is a Dud IMO and will not even go close to making it at AFL level.
Saw his game against the Bullants on ABC2 last night, and thought that his defensive pressure in the forward line was impressive when against 2 and normally 3 opponents.
Has kicked goals at the Burgers and is a more accurate kick than Chubba. Also has significantly more pace which suits the broader game plan.
Is taller with a better leap and has courage (perhaps not more than Chubba but he doesn't squib).
Chubba is 31, McGuane at 20 has more natural talent and therefore, IMO further upside.
Have you seen him play more than his debut game against the Swans to form such an assessment ?