remap or chip

Hey all ! First I want to say Hi to everybody and you guys are doing ok during these hard times. I'm based in Germany and I hope I hopefully I can be useful. My background is on chiptuning so any question regarding it Im here ! Thanks once again

Hi Im new so may be a dum question but if I was to get my Ibiza Cupra remapped would i get better mpg as i travel atleast 50 miles a day and think it gonna cost me alot of cash so may work out better in the long run? E.g. if i was able to save £10 a week then and to get it remaped costs...