Calories from Watts vs Weight and Heart?

Hi All,

I was watching the GCN show recently and they were highlighting the difference betweeen energy consumption (calories) as a function of the amount of watts pushed through the pedals vs. the estimation of HR and weight.   the Wahoo bike computers apparently track this, but I am not sure if the Garmin 1030 etc. do this?

Does anyone know?

Thanks,

gavin