If you want consistent results, you should set CBR (Constant Bitrate). This setting determines how the bit rate is sent to the Twitch servers. The results may be better on the x264 encoder, but only if it is not the main computer of the game. If this option is available and you are streaming the content from the same computer you are playing it on, the NVENC encoder is the recommended method. If you are using a computer with an Nvidia graphics card, you may have access to the NVENC encoder, an Nvidia protocol that allows you to transfer much of the work of OBS to your graphics card rather than the CPU. In your software settings, go to Output settings and then to the Streaming tab. This is not necessary, so here are all the settings you need to arrange in OBS Studio and Streamlabs OBS.
However, knowing the ideal settings for your streaming setup can be daunting, especially for those who are new to streaming or have little technical knowledge. If it looks good, viewers are more likely to come back. The quality of your pitch can make all the difference when new visitors see your feed for the first time. what your overlays show and how you look, the settings of your streaming software will determine how smooth your broadcast is.
If you control most elements of your stream, e.g. When you broadcast on Twitch, you always want to look good.