I went through this decision a few months ago. Watch Dcrainmakers take on them on YouTube or website. I ended up going with the garmin 830 for the simple fact that I have always had garmin products and have the garmin connect app on my phone. I have a few bikes and can switch them over very easily. Some people have different profiles for every bike. I just made two profiles...bike with power meter, and bike without. I just put it on whatever setting is needed for the current bike. I know there is a lot of garmin hate but this product has worked well and I have had no issues. Good luck on your decision. Don’t think you can go wrong either way.

If navigation is important, then the 830. Drop the mic. Also, for day-to-day use, the 830 US is far superior. Wahoo wins big on the initial setup. They both connect to everything and do everything. And, it is easy to move them between bikes with different accessories.

Just an FYI
If your cranks are shorter than 165mm the Wahoo will not accommodate.