I've only even ran aftermarket lines 2 from MC to each caliper so I can't answer that for you. Safe to say It wouldn't make a big difference especially for the cost of new lines. If you do get calipers and the banjo bolts are located differently you'll just have excess line which might be fine, usually only a rubbing issue or looks if that bothers you. Calipers are cheap and I've talked to a few people that have used M4s and nissins and say they are practically the same. Nissin's had better initial bite.
If you're willing to drop that much coin I think a far better option would be to get nissin calipers, upgrade the rotors from 300mm to 310mm and the proper spacers for the calipers. Don't forget longer bolts. It would be about the same or less depending on what rotors you go with and give you FAR more performance for your money.