tried a thumb and 4 finger large pinch (~1 htbsp) of the dried garlic flakes in south indian garlic (made 2 off).
it worked quite well adding just after the base had gone in. the slither still has some texture.
it says on the packet, "unleash the taste". there was no taste from the flakes - or not that i could make out. it's a long way short of the zaal garlic for sure.
worth a try. it would be more for looks that taste - they look nice in the curry.
Zaal garlic for me.