Although both of these 4K TVs are from different series still they have a lot in common. The RU8000 series is rather a kind of advertising move since there is nothing that radically distinguishes it from the RU7100 series. So, if to compare Samsung UN50RU7100FXZA vs Samsung UN49RU8000FXZA in terms of functionality, then the main features are the HDR technology for the first one and SmartTV for the second do not work at 100% in both cases.
If to compare Samsung UN49RU8000FXZA vs Samsung UN50RU7100FXZA in terms of picture quality, the RU8000 produces very high color accuracy. At the same time, this model is not very bright, so keep that in mind. Meanwhile, RU7100 has an excellent picture brightness and good contrast. Besides, there are certain problems with displaying dark scenes since often the lighter sides of the image disappear in the dark.
RU7100 does not offer any premium connection sockets that can be found on the back of a more expensive 4K TV's, so the user will have just:
Model RU8000 provides a slightly wider selection versus RU7100:
Both options have no legacy analog video connections, so there is no chance to hook up old VCR or SNES.
In terms of RU7100 versus RU8000 performance, both are approximately the same, and as an additional point, they do an excellent job with video games.
As for the design of Samsung UN49RU8000FXZA vs UN50RU7100FXZA, there is nothing special to discuss. It is similar to all TV's in this price category. These ones don’t have the thinnest profile or the narrowest front panels, but they manage to look just neat and stylish.
The main difference in design is the different types of feet, but such difference can hardly be called significant.
The Samsung UN49RU8000FXZA is better TV in this comparison. Check Samsung UN49RU8000FXZA price