Headphones vs IEM for gaming

I plan a lot of competitive shooters and find myself struggling hearing sound queues. About a year ago I switched to Sennheiser HD559 SE and have been loving them. I always see people recommending using IEMs and was considering trying them. I was looking at the Linsoul KZ ZS10 Pro and wasn't sure if I should pull the trigger. Would these provide a better gaming experience than my Sennheisers or should I stick with what I got?

(btw I'm not an audiophile and am new to audio)