Mist vs Cosmic - Seniors advice please

I made few calculations,posting here,

Particulars Mist Cosmic
BSP 4500 6000
Others 500 200
Car Park 600000 250000
Min. Size 661 150

Mist 661 sq ft 3905000 plc not added(like other charges they can surprise with plc also)
Cosmic 661 sq ft 4348200 plc not added
Cosmic 150 sq ft 1180000 plc not added

wherein they are having virtual space also

Attached Images