My Versa 2 shows less calories burned than my Versa

[VanMac1253]

Can anyone explain why switching from a Versa to a Versa 2 tracker would produce wildly different data on the same exercise?  I am a creature of habit, and walk or walk/run the same path, multiple times a week.  It is 4.1 miles.  Under the Versa it registered a calorie burn of 450 calories for the walk/run, and 373 calories for the walk.  This was consistent for the entire year, and it takes me the same amount of time give or take a minute.   Since I have the Versa 2, I register 298  calories on the walk/run and only 262 calories on the walk. This is a 10 to 30 percent difference!  I am so confused as to why the tracker would make the difference, since it reads my resting heart rate, fat burn, cardio and peak the same as before.  Does anyone have any insight?  I'm beginning to think that this Fitbit stuff is just guesswork. 😞

Moderator edit: updated subject for clarity

[EdsonFitbit]

It's great to see you in the Fitbit Community, @VanMac1253.

Thank you for the information provided.

For information about how your Fitbit device calculates your calories burned, please visit this article and open the menu "How does my Fitbit device calculate calories burned?".

Whether you consider that your calories burned are not accurate, please restart your Fitbit Versa 2 by following these instructions. In addition, please make sure the information on your Fitbit profile (birthdate, sex, height and weight) is accurate. 

If you have any question, please let us know.