I gave up on sugar in soft drinks about 25 years ago. I didn't like what it did to my weight. That has a lot to do with the volume that I drink...it's a lot.
I prefer Coke Zero as far as taste goes. I can't say that I care what sweetener it uses...i don't know...it isn't important to me. Taste is what counts after calories. When I first started down the diet soft drink road all those years ago I found that Diet Dr. Pepper was the closest to tasting like the sugar sweetened version. I still like it along with the variations, Diet Cherry Dr. Pepper and the new one with 10 calories. I drank Diet Coke (after I worked up a tolerance for diet drinks I found that I could tolerate it) for a long time until Coke Zero came out. After that Diet Coke tasted terrible to me. It's only in the last couple of years that I have found that Diet Pepsi is an acceptable alternative to Coke Zero.
I gave up on Coke products for two reasons. One is price as I mentioned above but the other one is Coke's sucking up to the environmental freaks. That started several month's ago when they started putting
polar bears on their packaging and stating that they were donating to save the polar bears from global warming or some such nonsense like that. So screw 'em. Now I know that Pepsi is almost certainly a Dem/lib sympathizer, too, but at least they aren't being in my face about it. So that's why my current soft drink of choice is Diet Pepsi.
Stupid, I know, but there it is.
(Diet Mountain Dew is passable, too, for a change of pace.)