Using a colour corrector is a better idea or a concealer to cover dark circles?

You can find a middle ground
Dont go for something totally orange and dont go for a concealer thats a couple shades brighter than your skin tone. Go for a bisque/ peachy color corrector/ concealer that you can use by itself
I use the bobbi brown color corrector and dont use a concealer over it. You may find a product claiming to be a concealer with peachy undertones that you can use

Both have different advantages!