My face is always broken out, especially for TOM. Doesn't matter if I'm having artificial sweeteners or not. Doesn't matter if I'm eating "clean" or not. Doesn't matter what kind of acne medication I use what my daily skin routine is. I've taken vitamins for my skin for months and months and still see no difference. So annoying!
As far as I can tell, I don't have any reactions to sucralose (Splenda), and I'll drink diet soda/tea sweetened with it. But some lite/sugar-free candies, and most diet drinks & sugar-free gum contain aspartame (Equal). I totally have a bad reaction to that stuff! I went through months and months of debilitating migraines a few years back, sometimes spending a week in bed unable to do anything but hold a pillow over my head, praying that the pain would stop. Part of me thought it was stress from moving across the country and being in a new climate, but my head was also foggy much of the time. I couldn't think straight nor concentrate on anything. No clue what the cause was until the night I was feeling decent for a change and my hubby handed me a bottle of tea. I doubled over in pain halfway through, and it dawned on me when I read the label. That was back when I was first attempting to ween myself away from sugar and had turned to diet products. And I felt so stupid; my dad had issues with aspartame years before (headaches and sores on his gums from eating sugar-free breath mints) that I'd totally forgotten about. A few weeks away from aspartame products and I started feeling like my old self again . . . no more headaches and the brain fog finally lifted.
I read labels on everything and no longer buy fountain soda, and in the stores I'm pretty much limited to Diet Hansen's, Diet RC, Diet Coke with Splenda (in the yellow label), and Zevia since everything else seems to have aspartame in it. The only gum I've been able to find in stores that's aspartame-free is Cinnamon Trident (even every other Trident flavor has aspartame, yeesh) but I read the label each time because there's always a chance the formula has changed (I found out the hard way once when drinking "lite" cranberry juice).
I've never noticed a difference with weight loss or bloating between either sweetener though, and have never noticed a difference in my complexion no matter what I do. But you never know, every body reacts differently to these things. Maybe you could try experimenting with abstaining to see how your body reacts, and then see if you have issues again when going back to it.
Good luck!