Is elephant garlic the same/more/less powerful than regular garlic?
Elephant garlic...yum...it's less powerful. Roast it with a drizzle of olive oil and scoop the softened cloves onto a baguette...the best.
Elephant garlic is not actually garlic. I believe it's a member of the lily family although it's marketed as garlic. It does have a milder flavor.
Make that the leek family.
Elephant garlic is, indeed, delicious roasted, but it has a milder flavor than regular garlic. Personally, I wouldn't substitute.