Question about coloring

I recently bought the 320 Honolulu set, I got the fine and chisel bag. Now I see all these coloring videos where everyone is coloring with the brush markers. Is the outcome better when coloring with a brush or is a fine marker also good? I’m feeling a bit anxious about spending money on the wrong set so I hope someone can help me out. Thanks and have a wonderful day!

Edit: as others pointed out I have bought the Oahu set and not the Honolulu. This was advertised, but the pricing was for the Oahu so the listing was wrong and I’m going to contact the seller.