well, i can tackle some AA info for you, and leave the rest to the true experts...
1) equivalent is Executive Platinum (EXP for short). 100K miles or points to qualify. you won't be comped to this level, as AA will only comp up to mid-tier (Plat, 50K to qualify).
2) comped to Plat. you'll have to fly the 100K to get EXP.
4) Plats get 100% bonus, EXP's get 125%.
5) reward availability is excellent, especially for Plats and EXPs. AA allots 'extra' award seats for their elite customers. Hawaii awards are tough on any airline.
good luck!