if I use Tixati in combination with qBittorrent, are there compatibility problems or not?

I would assume using the same port at the same time might be a problem.
why bother with qtorrent

thanks, I just wanted to know if I can download on 2 clients at once or if they are compatible or if I should use the same port or have different ones and if I can download without having problems with the download, or with the seeding.

I've used Tixati and qBittorrent together without any problems. They run separately, so you can have them both installed without conflicts. Just be careful not to download the same torrent on both at once—that can cause issues. Overall, they work well side by side if you keep that in mind!