It seems like the material used for these 3 color option are different:
1) Black, which is the lightest, uses aerospace special fiber on the back cover
2) Orange/Red, has the back made from faux leather and seems to be the heaviest
3) Green, which the case material look like the black unit, weighs closer to the orange/red than black
So which color will be you choice? For me, I am torn between the black and orange/red, and shall decide after seeing the actual phone.
1) Black, which is the lightest, uses aerospace special fiber on the back cover
2) Orange/Red, has the back made from faux leather and seems to be the heaviest
3) Green, which the case material look like the black unit, weighs closer to the orange/red than black
So which color will be you choice? For me, I am torn between the black and orange/red, and shall decide after seeing the actual phone.