I recently switched to a Venu 2 from Fitbit
I have been using Fitbit products for many years, and they consistently give me reasonable calories estimations.
I am currently working from home and I normally walk 3000 steps per day. According to my Fitbit watches, my calories count would normally be 2600 Cal in this case. However, when I switch to Venu 2, it gives me a number of 4000 Cal per day.
I work out sometimes, and on my workout day, my calories would normally be 3500 Cal. However, when I work out in my regular routine, the Venu 2 tells me I burned 5000 Cal that day.
I have even worn both Garmin and Fitbit together for a few days for comparison, and I still see a huge difference (2600 Cal vs. 4000 Cal).
I am sure that my weight, height, and age are correct on the Garmin app, but there is no way I could burn 4000 Cal per day when I just sit at home all day.