smoke24answered grow question 5y ago I prefer pro-mix which is basically peat and perlite.  I like it because it holds on to moisture better than coco and seems to have less ph variation.  If you have pro-mix available or some other brand of peat and perlite I would give it a try, however thats just my opinion, there are plenty of others who favor coco over pro-mix.  It's up to you, of course you could always do one plant in coco and one in pro-mix and see which you like better.  Happy growing.