rar and 7-zip are both compression formats as well as applications, so it can help to not get them confused. 7-zip as a compression format is simply more advanced and better than rar, which should be expected as it’s a newer format.
As for the software used to interact with the compressed archives, the official 7-zip client isn’t as streamlined and as nice as WinRAR, but it is open source and cross platform. And it’s not the only option, there are other applications that can be used to open 7-zip files (maybe WinRAR can even do it). Nanazip is a nice option that I’m currently using on Windows. But it’s ultimately a personal decision and comes down to whatever you prefer.
rar and 7-zip are both compression formats as well as applications, so it can help to not get them confused. 7-zip as a compression format is simply more advanced and better than rar, which should be expected as it’s a newer format.
As for the software used to interact with the compressed archives, the official 7-zip client isn’t as streamlined and as nice as WinRAR, but it is open source and cross platform. And it’s not the only option, there are other applications that can be used to open 7-zip files (maybe WinRAR can even do it). Nanazip is a nice option that I’m currently using on Windows. But it’s ultimately a personal decision and comes down to whatever you prefer.