Ann: Quarterly Cashflow Report, page-8

Two difference aproaches. One approach tight wireframes and narrow higher grade mineralisation ore blocks. The other wide lower grade, more tons, bigger pits approach.One approach supported by consultants and considered conservative. One approach to go bigger, and get the dirt the mill requires.
Bit like comparing rugby to aussie rules.
one approach you do all your dancing at the start, with the haka. The other you do your dance during the game with high kicks and jumping jacks.
One approch you find a more narrow direct path and run forward, take a knock, and run forward again until you get there.
The other you go sideways and backwards and handball when scared and have wider goal post so even if you miss s bit you get a point and derisk the chancing of missing.