The difference between the two is minimal in terms of functionality. However, the site is absolutely the same on a mobile device and desktop computer, while in applications, each section has a separate offer. Keep in mind that not every operating system can support the mobile application, so the only option for a given game may be available to you on the mobile version of the site. The only thing that may be the case if you use the mobile version of the site is the possibility of higher consumption of mobile data.