Fitbit Versa is underestimating my workout calories by a large amount.

[FitArtiles]

My Fitbit Versa is not capturing my calories correct during workouts. I have continued to use my Mio Alpha 2 which i know to be very consistent for the past year. example:

For the same workout my Versa said 382 cals, MIO Alpha 2 609 Total and 527 active. The avg and max hr pretty much matched. i checked my profile for age and weight they are correct. Not sure why the cals given are not even close. 

[AlvaroFitbit]

@FitArtiles Welcome to the Fitbit Community! It's great to have you here! You are comparing two different products from different companies so differences may arise. How does the MIO Alpha calculate your activity calories? Is there a reason you think it is more accurate than other devices? Have you tried using an online calories calculator to see how it compares with the two products? As you know Fitbit will use your personal information along with the heart rate data and, if you log the activity, the type of activity you are doing to calculate the caloric burn during this period but I can't really comment on other products as I don't know how they work.

I look forward to your reply!