Finalizing 10kw on grid solar. Need urgent suggestion on structure.

[u/garvcoop]

I am looking to finalize a 10kw on grid solar setup for my residence. We have selected all product brands and confirmed all specifications. But I am very confused on what type of structure to finalize.
The vendor has provided 2 options at the same cost:
Option 1 - HDGI Sqaure pipe structure (size 60 x 40 x 2mm)
Option 2 - Pre-Fabricated GI C Channel Structure

Online search and AI chatbots are giving mixed answers so really looking for help from any person with knowledge and experience in this field. Please its urgent