Could American officers have replaced British veterans in independence wars?

How would Chile and Argentina have differed if Americans, rather than British half-pay officers, played the larger role in their independence?

The United States lacked enough experienced personnel and institutional depth to replace the British contribution on the same scale.

American adventurers did join Latin American independence efforts and could contribute money. The United States nevertheless lacked the large standing forces from which Britain could release experienced officers. British veterans also had professional reputations and access to resources that helped them recruit and equip forces. That combination limits the proposed American substitution for British half-pay officers in Chile and Argentina.