Mother "Green Storm" is a bit like recycled photocopier paper. You can't tell recycled paper is any different to regular photocopier paper unless you read the package first. Similarly, you can't tell that Mother "Green Storm" is made with natural caffeine unless you read the can. And even then, it makes no difference. Apparently natural caffeine is better for you than the synthetic stuff. Both will make you alert, but the absorption rate and side effects tend to differ. Supposedly, according to some sources that I don't care to link to, natural caffeine tends to have a gentler spike-and-crash rate. Who knows --
It tastes like regular Mother. If you're a fan of that, then you'll probably like this. If -- like me -- you're not a fan of the acrid taste of standard Mother, then you'll probably think it tastes like piss and vinegar with most of the vinegar removed.
The can also claims "high caffeine content", which is peculiar, as it actually has 0.4 milligrams less per 100ml than pretty much any other energy drink that's available. While it's not unusual for these drinks to claim a higher energy content than their competitors, which can be justified by higher sugar levels, claiming high caffeine content when it's...not, is just peculiar.