Images generated with WAI-illustrious-SDXL v11, but it works with any Illustrious model. For a style closer to the original show, add "anime screencap" or "retro artstyle" to your prompt.

Peter Parker: peter parker, short hair, brown hair, green eyes, thick eyebrows, muscular
Spider-Man: peter parker, mask, muscular

Extra: mask lift

Peter Parker Outfit: grey jacket, open jacket, pink shirt, sleeves rolled up, black belt, blue pants, denim, white footwear, sneakers
Spider-Man Outfit: bodysuit, red bodysuit, blue bodysuit, spider web print, skin tight, gloves, boots, muscular