Welcome. Looks like you’ve got some good products there to choose from. I’m assuming these are prices before the STC rebates? Otherwise, they look a little on the expensive side - although 3 phase and multi story does bump the price up a bit.
Essentially you are choosing between Trina and QCells here, I think QCells would be my choice. If you are more confident in the company from quote 1, I always think that is worth spending a bit more for.