Indy LA-X vs. Eddy heads

Doesn't the cast iron heads hold up better--take more abuse? Like the motor running hot cause you got caught up in a traffic jam-or those one red light after another. After a hard run if you need to stop or creep along for 5 mins later its easy to see 210 water temps.

I had my MP cast iron heads on for 3 years and had the temp red gauge (msd) go up to max 250 a few times over the years--yeah I know but like nothing ever seem to go wrong. Would those Eddy heads took that type of abuse without needing to be pulled and milled flat again?