Takoyaki vs Aebleskiver Pan: What's the difference

At first glance, a takoyaki pan and aebleskiver pan seem to look exactly alike. They both have holes where you can pour ingredients and gently simmer over a stove until the balls take shape. So what’s the difference, and can they be used interchangeably? Takoyaki pans and aebleskiver pans are made of similar material (typically cast iron or heavy-duty aluminum).