The btu's (power?) in alcohol are the same in a eCHS stove as is in the Starlyte burner/stove.
The delivery of that power to a pot bottom can be different and the "speed" of boil can change.
The size and material of the pot makes a difference on how "fast" the "power" will be absorbed.
"Variables" oh how we have to contend with "Variables"
What lane are we in???? Fast, medium or slow?
Do we like one piece stoves, stoves that don't spill fuel if tipped over or canister stoves that roar and are fast or maybe stoves that smell like fish(esbit). "Variable" likes and dislikes