Every angel will have different preferences (usually based on what you have in the tank). Fleshy lps seems to be the most common favorite as well as some sps.
My coral beauty likes my gorgnian and and my acan.
That’s part of it. It also depends on tank size, how much it’s fed, how many corals are present, and other factors. A well fed angel with lots of space to move around (and sample from) is less likely to eat corals.
I have both Pigmy Cherub Angel and Flame Angel in my mixed Reef.
I am lucky so far and I haven't noticed them nipping on anything. However I do lot of feeding with variety of foods.
They ate beautiful but very mean toward other smaller fishes.