Use both, depending. Always 500ml in a 750ml bottle, topped off with water as I, too, find them a bit too sweet. Gatorade has less calories so I tend to use it for shorter rides (2-4h). Powerade seems to have a little less sodium (haven't checked the label recently) - sometimes GA can taste a little salty.

For recovery I use Aquarius, also by Coca Cola, it's less sweet with a more neutral flavour and a lot less colour. Haven't seen this outside mainland Europe, however.

In UK I use Lucozade Sport, diluted as above - very similar to Gatorade. this was the stuff that first got me into using sports drinks: seemed to be like rocket fuel when I was out hillwalking.