I have a samsung topload, it uses total of around 300L at max water level (wash + rinse). No issues with cleaning, one load takes 3-4 teaspoons of detergent. If your cloths are really dirty, then yes you have to manually do some cleaning but in our cases, we never needed it. I am quite certain that front load wont clean such dirty cloths either.
Power ratings are less than 300watt
Another advantage is that you can intervene any time e.g. to add more cloths or detergent etc. In case of frontload, once its locked, you cannot add more cloths. Front load also gives you backaches so its not that easy on you
Few months ago i was confused between front and top load, now i am happy with my decision. It is less costly, more flexible and easy on cloths too. I have washed my cloths in a front loader made by C D I, it used to tangle the cloths very much