Regals my vote, less hassle as far as aggression and size issues. Regals seem to be very passive unless raised in their own tank. Looks is on you, both are nice looking fishes... Ive had two regals, an adult that took weeks to acclimate and almost died during. Now I have had a juvi that doubled in size in less than a year and has been very hardy during this time. I believe they grow at different rates depending on lots of things, number one being whether its a dominent fish in the tank or not. Even though regals are known to be touchy Ive seen more queens with ich or hlle and never seen a regal with hlle to this day.