What do you have to say @skyguy?
Hard to argue with half the cost. A few things though. The first quote I got from the company I went with was for 300w Trina panels. From my limited research, it seems like a real step down from something like SunPower or LG, but I encourage you to find out more details on the specific models being offered in the various quotes you get (start here -
https://news.energysage.com/best-solar-panels-complete-ranking/). Some key differences may be the warranty (length, coverage, labor cost for replacement, etc.) and the expected degradation (what % of the initial production you can expect after 5, 10, 15, etc. years). Also find out what kind of inverter(s) (see here for an explanation of the different types -
https://www.energysage.com/solar/101/string-inverters-microinverters-power-optimizers/) are included, and which monitoring system is included if any. I have microinverters and monitoring from Enphase, and I'm happy with it so far.
As you can see from the links above, EnergySage is a great resource in general. Might be worth reading through their whole Solar 101 section.
If the choices end up being just the 2 systems you gave details for here, I'd have a hard time paying double, even if it's a markedly better system. I assume the lower quote came from a non SunPower installer. Maybe ask them for a higher end quote - something with LG/Panasonic or similar panels and SolarEdge/Enphase or similar inverter system? It for sure won't be as cheap as with the Trina, but it come in lower than SunPower at a price point that's worth the upgrade over Trina.