I got my 2019 for $68 OTD (TTL, Freight, Dealer Fee, etc) with an MSRP of $72XXX. I also looked at a 2017 with 22k miles from a private seller for $53k and a 2018 with 2k miles from a dealer for $60k OTD.
There are better Raptor deals out there than what you are seeing.
Comparing it to the Platinum, there is no comparison. A Raptor is an entirely different truck. I also looked at a 2019 King Ranch that was like $54k OTD. Test drove the Raptor and it wasn't a comparison anymore for me.
I've owned a 2017 KR and my 2019 Raptor is an entirely different truck. Would highly recommend springing for the Raptor if you can afford it.