it's different. both are good. better or worse depends on the mood and what kind of feelings you want from the story.
I'm more of a manga person, so I'll base my judgment on that.
it's got a more fantasy vibe than dress-up darling (it doesn't strive for realism), the world the story takes place in is a bit better, brighter, more positive, larger-than-life and the plot is happier than that of dress up darling. the actual parts of creating cosplay are glossed over to make place for the drama arcs of the characters. it's a journey of "meet character, action scene, flashback as needed, resolve" with cosplay as the connective tissue and the thing the characters experience their emotional issue through.
reading through it again, i can see that it has a thought-out plot progression, so it's not just repeating the same story beats again and again, which is a plus. I like when they do the reference based humor (I usually recognize the HxH ones, and not the dark souls references). I know cosplayers in real life (through social media), and it's great to see a depiction that cares for them.
however, the romance based parts are weaker in my opinion, and the series picks up only after a volume or two, when we get to the first event and meet the first out-of-school friend.
also, I'm excited to see real-life cosplayers re-create the fictional characters.