I don't at the moment, but I have in the past.
The difference to my mind is that etsy is more focussed on "handmade" , with a side order of "vintage".
This means they have a different, again more focussed, customer base.
While eBay items made by true artisans and crafters are overshadowed by factory made reproductions, a collector looking for original products will turn to etsy.
This in turn should mean that the crafter can charge what the item is actually worth ( minimum wage!WOOT!) instead of competing products made with slave Uighur labour.
Having said that, you may sell more on eBay than on etsy, simply because eBay has a larger market share.
There is no reason not to sell on both, as long as you are very very careful about deleting sold items from the other site as needed.