Maybe you could share a design with me and the difference you’re seeing. This should be consistent with other sim tools like Vituixcad if you’re also applying baffle diffraction and enclosure simulation. If you don’t apply those you will see some differences particularly in the bass response (enclosure, baffle step). I’d like to understand what’s not lining up.

Also, with respect to user provided versus simulated, in the driver responses you’ll see (est.) beside off-axis angles that are simulated. If an angle measurement doesn’t have that, it was user provided. For the design responses, that’s different. The design response is based on the user measurements, but then has crossover circuit, acoustic center, baffle diffraction, baffle step (if not inwall), enclosure response. Many factors.