I am planning on ordering my frame soon and am trying to decide on size. I am 177.5cm and am trying to decide between the 52 and 54. My current bike is:

• Poseidon X Gen 1 Size Large
• 25 Degree setback seat post
• -6 degree 80mm Redshift Shockstop stem
• 165mm crank

When I compare the geometry between the GR201 and the Poseidon X it looks like the 52 would match up better:
https://bikeinsights.com/compare?geometries=660fe85e11653c00217d7346,61bc1d8de3b7f3001e48a170,

But I also noticed that the geometry of the GR201 seems pretty similar to a Specialized Crux and when I enter my height and shin length in their size calculator it recommends a 56 in the Crux which lines up more with the 54 in the GR201:
https://bikeinsights.com/compare?geometries=660fe85e11653c00217d7347,678d79ac0327fc001b45ef3c,

I haven't been riding gravel/road long enough to know if my current bike fits me well so I am leaning towards going with the 54.

Any help would be much appreciated.