Link to what I have found out about this below.
TLDR, Garmin “fixed” a bug where they now count metabolic calories as a part of a workout. The numbers should be the same if you look at “work” in Garmin Connect and TR.
I have had a chat with Garmin about this recently. They have released an update (on about 14Jun2021) where Total Calories burned is your “resting calories” + “work performed” during that workout. So in your example you burned an additional 1978kj (work performed) during the ride.
To specifically answer your question, you should use the 1978kj to add to your caloric budget. The additional 350 calories in the 2353 number is already accounted for in your BMR.
As an aside the Total Calories is the…
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