If you are looking at an XC hardtail at that price point, I’d also take a look at the Specialized Chisel. It’s the lightest of the bunch, a good geometry, and has pretty good components, plus boost 148 spacing.
I cant say anything bad about the Kona cause I have no experience with them. But I can tell you that after test riding and research, I bought my wife a X Caliber 7 for Christmas. I admit to being a Trek fan, but thats because I have owned many Trek’s and loved all of them. Had actually considered a X Cal fot me as well, buy decided to go with the Trek Stache 7 instead. Honestly, test ride both bikes or other brands as well. Then buy the bike that gives you the biggest smile. All that counts is if “you” are happy with your choice. I would just suggest that you get a bike from a dealer close to you. Makes it a lot easier in the event of needing repairs or service.