It'll work, but (assuming everything else is the same: lines, dimensions, stakes, etc.) it'll be about double the weight of your Superfly. "70d coated" probably means a polyurethane coating, which is heavier than the silicone impregnation used in 30d sil (which is what the Superfly is made of), on top of the 1.9 oz/sq yd base weight of the fabric (versus 1.1 oz base weight of the 30d)
Price you pay for camo, honestly. Uncoated camo fabrics can be had in very light weights per square yard; coated camo fabrics (for whatever reason) are usually heavier. At least, that's been my experience.
Hope it helps!