I have very old top loader. My Mother has an almost brand new front loader. Maybe the front loader uses less water, but I see no improvement in cleaning and all the gyrations the front loaders go through seem pointless. And while they may use less water, they sure seem to take a long time using it. I looked at the CR ratings and the top rated front loader took almost a third longer to complete the washing cycle than the top rated top loader. Both were given top marks for "washing performance." Interestingly, both were also given top marks for "water efficiency." The front laoder had a target price of $1100 (and that doesn't include the base you need to get the thing up off the floor so it is easier to load). The top loader had a target price of $700. I can't see paying almost 50% more for a longer cycle and otherwise similar performance (I am only comparing the CR top rated models, there were wide variation in prices for both front loaders and top loaders - in fact I think the most expensive machine listed was a top loader, but so was the cheapest by a large margin). The only advantages I could see in general for the front loader was slightly better "energy performance" and that CR claimed it was more gentle on the clothes.
I know sooner or later my old top loader will die....I suppose I'll end up buying a front loader to replace it but I am not sure why. Probably becasue it will look good next to my Dyson vaccum cleaner.
Ed