Is there a difference between the different types of apples?

Yes, there is a difference. The most common and popular Red Delicious apple, may be one of the healthiest foods on earth. A Red Delicious apple contains more antioxidants than seven other apple varieties. Jonagolds and Golden Delicious apples contain the most quercetin, which can boost memory. Granny Smith and Red Delicious apples are especially good for the skin; they fortify both collagen and elastin. It's good to eat a variety of apples, so that you can get the benefits that each one provides. All apples are good for you, but they each provide different things for your body. That's why I choose to eat many different types of apples, instead of just eating my favorite. Each type of apples have a different flavor, texture, and level of sweetness. I hope I have answered your queries, and satisfied all your curiosity.

Yes, the taste is just one aspect though. It's all in the breeding. This is what I mean by bio-diversity. There are now only a handful of different apple varieties around. They have been purpose-bred for our visual & eating pleasure as well as long shelf life, less prone to bruising, etc, etc. At the turn of the last century, there were dozens & dozens of different apple varieties available in the world. Now you can only really find a few red ones, a yellow one, a couple of green varieties & not much else. We should make more of an effort to find out exactly how our food was treated before we buy it. That's one reason why I'll only buy certified organic fresh produce, which also taste much better that the regular stuff.

Besides the differences in texture, the darker a fruit (or vegetable), the more nutritious it is. I enjoy apples, but do not like very crunchy apples or fruits for that matter.

There's taste. There's colour. There's texture. There's ability to retain shape or crumble completely when cooked. There's vitamin content (When I looked at the vitamin C list years ago, Sturmer topped it. They have been replaced in our shops now by the ubiquitous Braeburn, which has almost as much, but I do miss the Sturmer). And quite a few more. I don't know that green apples are always sour or red/golden ones always sweet. They do vary - there is quite a sweet green variety that is native to France (I tasted them in the Vosges) and isn't among the bastardised varieties grown in France that we can buy in the UK and I prefer to avoid. And if you buy them in the shops they won't have ripened on the tree (mostly) and will not be as good as those that have. In the house in which I grew up we had a tree with lovely apples that my parents never managed to get identified. The known variety that nearest resembles them is the Blenheim Pippin. I do like the russets as well (Egremont is the best known, but Ashmead Kernels are delicious). One friend of mine said his favourite was Dunn's Seedlings - tastes differ. And some are, I think, inedible, with very low vitamin content - for instance, I've never succeeded in eating an Apple iPhone (and I wasn't been too good at it when I tried to use one - give me a proper laptop with a proper keyboard any day - but not to eat!).

I don't think theirs so many differences and but i have heard and read online green apple have fewer calories than the red ones. I personally like the green apples i love the taste- more sour. :)

yeah actually i have eaten three types of apples .. and i think the yellow coloured apple is the best because it is a bit sweeter in taste and far better than the red and green.. meanwhile , red apple is also the highest selling and produced apple its taste is also good but i prefer the dark red coloured apples they seems to be fresh and sweet also .. i dont know why i dont like the green apple its taste seems to me like sour type and its taste becomees better if you will mix other fruits with it .. hope i have given you a little bit hint about diffrenet apples

Besides color and taste, apples mature at different times, so we can have a sequence of seasonal apples. I just had some HoneyCrisp apples and so right now they are my favorite. As someone else stated we have had more types in the past. I believe the heirloom apples are much more flavorful. I tend to like the firmer, crisper apples, but I like the ones that are "blush" types, yellow underneath with red color on top.