The difference between soda is very noticeable to me. Some store-brand sodas taste almost flat.
I can't tell much a difference between wines of the same type. They taste slightly different, but I can't say which taste "better."
Cheap liquor seems "harsher" than more expensive liquor; even with vodka, which doesn't really have a taste. The difference in taste of say, the regular Jim Beam and a barrel-proof bourbon is pretty noticeable.
I've noticed no difference in 100% fruit juice by brand. Well, except for orange juice.
Tea quality is very noticeable to me, but I'm a heavy tea drinker.
Even different water brands have different tastes. But, as long as it's not my tap water (which is very hard and smells like a swimming pool), I don't really care.