Yes, SP panels have a superior warranty and they are more efficient than the panels Tesla is currently using. They are definitely pricier, but, you don’t get what you don’t pay for. If you are planning to be in your house for a long time, the premium could well be worth the extra $ as the lifetime power (KWH of electricity produced over the life of the panels) will be more than that of the panels from Tesla. Another advantage of the SP panels is fewer panels for a given system size. SunPower warranty’s cover the whole system as well so it’s single point warranty issue solves.
Many SunPower installers are also certified PW installers as well.
Cheers!