Hyrox is a relatively new sport, which means athletes are coming from incredibly diverse backgrounds, and that brings both opportunities and challenges.
If you come from a running background, you likely have a strong aerobic base and solid running economy. However, you may find that absolute strength or the strength-endurance demands of the workout stations are where you need to develop.
If you come from a CrossFit background, you probably have excellent strength and power. The challenge, though, is pairing that with efficient running that doesn't completely drain your energy reserves before you even hit the next station.
The bottom line? Every background has its strengths and its gaps. The real question isn't where you're coming from, it's knowing what your limiters are and building a plan to address them.