i have had both round eye and i just got the vision-x.
round eye LEDs spread the light very nice, have a good way of mounting them and the wires are tiny and easy to hide.
i had 4 white ones for rock lights and they dont do more than just glow under the truck a little bit. they arent for seing at night they are for accents and a little glow under the truck.
i just got the vision x kit in green. it comes with 8 pods for $120 a remote about the easyest wire job you will ever have. but the mounting system sucks, i used double sided tape instead of like the round eyes rivets. they are more of a spot light LED than a flood. and every thing is plug and play wich means you cant really shorten the wires, and the wires are huge.
my opinion buy them more for a camp light/glow/accent.
thats why i got green this time and not white.
vision-x is good for the price, but i think if i had the money to get 8 round eyes i would