I love the lighter one on the right. The blue color is intense and saturated and it glows. The one on the right is too dark for me, and while it may look good in bright sunlight, that is not where most people spend their time.
Most people are indoors, so to me, colored stones need to look good indoors and under artificial light.
I think the lighter one is perfect, but that’s me.
Hope that helps. Congrats on your soon to be bracelet.