Hi, thought I would add my two cents in!
I am not sure of the hows and whys concerning the individual sweeteners, but here is what I use and why.
I use splenda because it tastes the most like real sugar and is good to bake with. I am a diabetic and it does not effect my blood sugar at all when I put it in my coffee! Pretty much I hardly ever bake, mostly around the holidays, but I have to have my morning coffee and splenda really does make a great cup of coffee and 1 packet has less than 1 carb. Although the creamer contains carbs- what we do for caffeine! I am on an insulin pump, so I check my blood sugar 6 times a day and have not noticed any abnormalities while using splenda. Keep in mind my major concern is with my blood sugar numbers and not weight loss, although that is always a plus!
I will occassionally put equal in my iced tea, but I don't like the aftertaste when it is in hot items. I tried stevia once because it is only 1carb per serving and couldn't stomach it (though I find it interesting the bottle would say no carbs, but the nutritional label says one gram per 1/2 tsp serving-my bottle is from 2001). I got a sick headache from it, but I have several food allergies so I am sure that is just me be allergic to one of the fillers in it.
My dietician also said honey was ok in small quantities, but I have been too chicken to try it and see what it does to my numbers.
However, my endocrinologist is dead set against any artificial sweeteners he suggested using fruit! I cannot figure that one out for my coffee! LOL