MacBook can be connected to an external monitor if desired, whereas Mac mini obviously must be connected. Personally I have an older Mac mini (M1 16Gb) for my ham radio setup, connected to a huge 4ft wide curved gaming monitor, giving me loads of screen real estate to fill with apps. I do use it for photo editing and it's excellent, although purists will say that curved monitors are not an ideal display as there may be distortion of the image. Many people go for BenQ monitors to use with their editing computer. My MacBook is an M2 25Gb, more powerful but I only use it away from home or if tinkering on my lap whilst putting in time with my wife in front of the tv!