While all of the emoji from Apple, Google, Microsoft, etc. have the same general design, the one from Samsung Experience 8.5 looks completely different. In Samsung Experience 9.0, it's much more in line with the norm.
There are changes to a lot of other emoji as well, including kissing, smiling, grimacing ones, and more.
Lastly, in addition to updates to existing emoji, Samsung Experience 9.0 also adds a heap of new ones. You can check out the full list here, but some of the highlights include barfing, head-exploding, and start-struck emoji.
The new emoji style will be available on the Galaxy S8/S8+ as part of the Android Oreo and Samsung Experience 9.0 update, and we'll likely see them make an appearance on the Galaxy S9 out-of-the-box following its debut at MWC 2018 later this month.
Source : https://www.androidcentral.com/samsung-experience-90-makes-emojis-galaxy-devices-less-awful262