The one on the right for sure!!

Left. So many possibilities with that tile! I absolutely love it.

These high-contrast mosaics are very busy, so they will look best with a very simple solid color countertop (i.e. not a busy granite pattern). I prefer the one on the right, but to be honest I'm not a big fan of this much color range in a backsplash. I prefer more subtle mixes of colors or solids.

What does the rest of the room look like? It's difficult to choose if there is no context.

hmm, double post .. other one is a poll.

Thanks for the feedback. Here's a pick with the kitchen, counter and back splash choices. Thanks again.
I posted this question in two places just to maximize my feedback. Thanks!

Both backsplashes are too busy with your granite. Find tiles in either a solid or monochromatic.

I agree with mountie.

You need a solid subway tile. Med gray would work.

I agree it's busy but if your going with one of these for sure the second one.

If I go glass mosaic subway tiles, what color would you suggest?

Right!!

I like your choice of granite with the left mosiac tiles. The colors are very nice.

I had the same dilemma with my kitchen same countertop style, chose to go neutral with a border tile.

The one in the right