How to verify ABRP has my estimate range correct

I just setup a subscription so that I can add two cars to my account. My first and current car is an Acura ZDX RWD. I have always found ABRP to br relatively accurate on energy use and route planning. But I am considering a Rivian R1S Dual Max Battery with 410 miles of range. I added that as a second car, but when I route plan between the two cars I cannot believe that ABRP accurately knows the max battery package has a 410 miles range. But I cannot find a way to actually verify this. I would think there must be a way.

The route planning that ABRP gives me is way too close to the ZDX. And very different from what Rivian.com tells me, which takes me much further between charges and noticeably fewer (nearly half) as many charges per road trip. Something is wrong.