To be honest,there are a lot of verables.light,co2 available, nutes your using,etc..but if you do everything right and have it failed in,yes..its my opinion and from what I've read that your plants would grow faster and finish bigger/quicker in coco than it would in soil.you can feed much more in coco,but if you don't have the light needed to convert the nutes then it don't matter..same w co2.if you only have so much available by either supplemented co2 or fresh supply being brought in threw venting then your plants potential is restricted.but yes,plants grow faster and bigger in coco then soil.