If so, how much would I be saving in dollars and cents?
Coinbase has a shitty system for the direct buy option on the basic version, so the only way to exactly know this is to actually try it, they have a fee that is based on the spread which can vary quite a bit, up to 2% as they admit, so you might end up paying over 200$ just from that, and also another fee if you use a cc card for that purchase, ACH deposits are free.
So the best way to know for sure is to open the account and see for yourself.
LE:
Since I see you're from NY, then you're really low on cheap options, Gemini is not that cheaper either and I think the only option would be Bitstamp.
Thanks, I suspected this.
Since I'm lazy, I'll probably just hold my nose and buy through Coinbase. I don't want to go through all the verification, I.D., and waiting bs that I went through the first time around in 2017, especially when I'm not even sure the savings, if any, will be worth it, and Coinbase Pro is slated to disappear by the end of the year, anyway.