First of all, the OP asked for a road e-bike. Topstone is a gravel e-bike and that makes a difference for a roadie. Although the Topstone is pretty lightweight as for an e-bike, Specialized Creo SL is even more lightweight. The Specialized SL system is unique in the sense it is not only lightweight but it also ensures a long range provided the cyclist is ready to get some workout. I could say a lot about totally natural riding experience of the SL e-bikes that feel traditional e-bikes but add some steroids to the ride, which is vital upwind and uphill. An SL e-bike can be easily ridden without any assistance.
Regarding the range, it can be easily enhanced by adding a Range Extender, a 1 kg (2.2 lb) water-bottle-battery. And, Specialized Turbo Creo SL is at the latest version of the Specialized system, while the Topstone is still using the older Bosch E-Bike system (not the Smart System). The Specialized system ensures full connectivity with sports devices, and it is fully tuneable (so the rider can easily manipulate assistance levels for either long distance or fast riding).
The OP is already a Specialized e-bike rider. This is my explanation for my curt "Specialized Creo is the answer".
View attachment 129761
The aluminium version of Creo SL I demo-rode.
View attachment 129762
The real disease of this Forum are some people like Tom who have never ridden a premium e-bike but form opinions (you Alaskan are a different person). I took my time and spent money to give a Creo a long demo ride on a very cold Autumn Saturday. I decided that e-bike was not for me just because I could not really ride with drop bars. Otherwise, it is an excellent road e-bike. Besides, my big Specialized e-bike is a Euro equivalent of the OP's Vado 6.0, and I also ride Specialized Vado SL.
There is a big community of Creo riders in these forums, and I am sure they would like to share their experience.