Had a 19 LTZ 6.2 10 speed and have a Ram now. There was a lot to like and a lot to dislike on the Chevy. Overall it was a great driving truck and that’s mainly why I bought it. Powertrain, steering, brakes, handling were all much better than Ram. Interior was obviously worse, but very functional and well laid out. DFM is extremely smooth and works much more seamlessly than the old AFM and the Hemi MDS.
Being a first year truck, the 19s do have some issues so proceed with caution. If it has a sliding rear window, check it over for cracks in the frame, previous repairs (sealant in the window channel beneath the roof spoiler), and stains on the headliner. Or better yet, get one with a solid rear window. The sliding window leaks are extremely well documented. We are now near the time where the older and/or higher mileage 2019s are no longer under the bumper to bumper warranty. You don’t want to have to deal with this problem out of pocket after you just bought it.
The 8 speed also had some issues but there was an updated fluid used in trucks built after March? of 2019 that apparently smoothed things out. Most people are happy with theirs.
Ultimately you could make a strong case for either brand. Compromises will need to be made somewhere. Keep in mind the Ram was also a first year truck for 2019. I’m sure there were plenty of issues there too.