Yes, in parts of the country Tesla's network is FAR better. It's not just the route planning. To see this, limit to CCS sites with more than one charger, greater than 50kW. Plan a route from Detroit to Richmond, VA. The natural route is through WV, which is pretty much a charging wasteland right now. But even skipping WV's weirdness, just look at any of the North-South routes in Ohio. I-75, I-77, and I-71. Between Toledo and Cincinnati there's only one CCS station with greater than 50kW (an EA station along I-70 at Huber Heights). It's similar between Cleveland and Marietta, with just a single EA station along I-70 at Cambridge. The East-West routes are decent (I-70 and I-80/90) but the North-South routes are very poor. Tesla has those routes filled in nicely, by the way.
It's not just Ohio and WV. Indiana's North-South routes are the same way. Another example: Plan a route from Minneapolis to Seattle, using only CCS. EA is working on filling this one in, but just six months ago (and this may still be true, since I don't know if EA has finished construction yet) this trip had to be done by going either way south or through Canada. Tesla has these holes filled.
The city I live closest to, Dayton, OH, has a single > 50kW CCS station. It's the aforementioned EA station in Huber Heights along I-70. EA just announced a second one along 675, but that won't come until later in the year. There are two supercharger stations, so opening those up will more than triple availability here.
Yes, opening up Tesla chargers really is a big deal in some parts of the country.