If you washed it would some of the sparkly's come off?
Some of the sparkly fabrics look like glitter that has been glued to the front. I've always wondered if it would come off in the wash.
But I agree use which ever side of the fabric you like. Some of my scrappy fabrics and precut 5" squares I'm not sure which is which and I just use the side I like. In my group I'm the one who accumlates people's usuable scraps. I make a lot of strip and crumb blocks.