They do different things. I have both a Weber Spirit and a Recteq Bull. I can do some grilling on the Recteq, but it's built more for controlled low and slow cooking. Whereas I can get ripping hot temps on my Spirit within a few minutes. The Spirit is also cheaper to run since propane is cheap and it's fuel-efficient, so it's great for regular cooks where I'm just grilling some meat or similar.
Also be careful with Traeger. I know a few years ago they shifted a lot of their manufacturing to China and their QC took a huge hit; not sure how much of that's still true but you need to do a lot of research before you pull the trigger on any of their products. Yes, the Recteq is made in China as well, but they do a lot of checking and QC with it, plus have phenomenal CS, and it seems like the factories they use aren't the ones churning out crap, they spend a little more care in materials quality and assembly.