Fitbit: One vs. Flex 2 Burn Question

xLyric

I've been using my One for over a year and was given a Flex 2 by a family member, and I've been using them both to see which I want to keep. The Flex 2 is surprisingly close in step count to the One; it's maybe 50-100 steps behind the One at the end of the day, which I'm impressed by. I was expecting it to exaggerate steps because of arm movements, so I'm happy there.

The calorie burn is confusing, though. Yesterday, my first full day having the Flex, here are the numbers:

One:
Calories: 2,668
Steps: 13,419

Flex:
Calories: 2,790
Steps: 13,394

My stats are almost exactly the same on both accounts. The One is connected to my Aria, so the weight on that one differs by maybe a pound. That's the only difference I can find.

Why is the calorie count so far off? That's a whole extra snack for almost the same amount of steps.

I should probably clarify; I'm looking only at the end-of-day calorie burn total on Fitbit (not MFP). No adjustments or food are coming into play here, just the daily totals by themselves before any deficits are looked at. It did occur to me that even though the steps are the same, I WAS wearing the Flex longer. The One came off with my bra, but I kept the Flex on. However, I was just reading in bed until I went to sleep, so there were no steps to account for (it was not on while I slept). I know that when you're not moving, Fitbits count calories as if you're sleeping, but surely it wouldn't give me an extra 100 calories just for (maybe) recognizing that I'm conscious.


I posted this in the Fitbit group (and their own forums) but thought someone here might have seen this before.