If you are thinking what service is better for you, I recommend you to rely on Writing-Help.com. Pay attention to the above-mentioned characteristics and read a brief summary of both services.
Most reliable essay writing services do their best to create a user-friendly website, so both services have a good design. However, Writing-Help.com is good at many other things that play an important role while choosing the best service to place a bid.
As Ultius has been working in the niche for 6 years only, they are not experienced enough to provide high-quality papers, so the level of proper English grammar is not so good. On the other hand, Ultius has not so reliable money-back guarantee, so you need to double-check the paper before accept it. Lastly, Writing-Help.com can satisfy any needs while the variety of services on Ultius is limited.
Give it a try and improve your academic writing with good services only.