Not on the same amount of light output, they're not.
The key measurement here is lumens per watt. no one seems to publish this info, though, or if they're being especially shady, they'll leave out the lumen rating, the watt rating, or both entirely, so you can't figure it out yourself. also, it's difficult to know how the light output is measured.
if something sounds too good to be true, it is either not true or not that good.