This is not an accurate way to test.
You don't know when the exchange actually initiated the transfer. Just because you hit the withdrawl button on an exchange, that doesn't mean the withdrawl transaction is immediately initiated.
An exchange will wait until it has a build up of funds to transfer and then perform the actual transaction with all of them at once (to save on fees).
If you really want to compare the two then you need to send coins between two wallets that you control. That'll give you an accurate picture.
I'd recommend you try it again between your own two wallets and then post your results. I bet they're much
yeah that's a good point, I will redo the test that way
That bot just plagairized my comment on this post to take advantage of the upvotes that my actual comment received and you just not only replied to it rather than the original post (which has been sitting at the top of the comment section since this was posted), but you also gave it an upvote..... doesn't reflect well.