where is this tile going? left one matches better

consider doing the stain proof type grout if using that lighter color on the floors.

Mapei FlexColor CQ (Lowes) is an acrylic grout that doesn't have to be sealed. if using this, please make sure the installers are familiar w/the clean up process for this tile. it's a bit different. there are videos on youtube demonstrating it.

I've always heard that using a grout color that best matches your sample, is the way to go. I think you should choose the grout on the left. Good luck!