This might be just about the most awkward product marketing page I've come across in my memory. I personally probably will never be able to afford a model S. So I'd essentially be their market for the 3. But looking at how they talk about it, they've pretty much unsold me on it. The worst is this paragraph:
"Model 3 is designed and built as a mass market, affordable electric vehicle. Although it will be our newest vehicle, Model 3 is not “Version 3” or the most advanced Tesla. Like Model S, it is designed to be the safest car in its class."
The actual sales page for the Model 3, https://www.tesla.com/model3, does a much better job at selling it. It could be argued that anyone looking for a comparison page between the two models would be someone considering the Model S, in which case it makes sense for them to focus on upselling it. In other words, you're not the audience for that page.
"Model 3 is designed and built as a mass market, affordable electric vehicle. Although it will be our newest vehicle, Model 3 is not “Version 3” or the most advanced Tesla. Like Model S, it is designed to be the safest car in its class."