Samsung over Hisense EVERY TIME it fits in the budget. Hisense uses lower build quality and buggy firmware that they don't fix especially if it's android OS on their budget lines of TVs. At the same time, while Samsung Tizen OS is very popular due to how popular Samsung TVs are, it does not have the universal app support that Android OS TVs have, so if you want an Android TV, pick a major brand, not Hisense.
I'd sooner just get the Samsung if these are the choices then if you need full android support, get an android HDMI dongle to run those if the day comes that you find apps you need that won't run on Tizen. Most people won't care but the Samsungs also come with Samsung TV Plus feature which is hundreds of B-list channels that stream for free, and is integrated reasonably well with the remote so not as much wading through menus to use. On the other hand, their budget TVs have pretty pedestrian remotes if you are picky about that.
Everything you love about TV at zero cost. Stream 400+ live TV channels, 1000s of movies, and shows on demand. No credit cards, contracts, or cables.
www.samsung.com