[Routine Help][Product Question] ELI5 - What's the difference between antioxidant serum and vitamin C serum?

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For context, I'm a 23/F with mild hormonal acne and mild acne scarring. I'm also very freckle-prone.In an effort to help fight the existing acne, reduce some of the scarring, and take preemptive action against wrinkles and aging, I've recently started incorporating serums to my routine. As of now, I'm using a glycolic acid serum and a retinol serum in the evening and an antioxidant serum in the morning. However, I'm also hearing a lot about vitamin C serums. For instance, my antioxidant serum contains a lot of vitamin C.Are they merely two different names for essentially the same product? Or is there a major difference between the two? And if there is, which should I be using for my particular concerns?Thanks!
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Submitted by shandelion