Well yeah, it's in LCE so obviously looks good for spodumene concentrate producers. They are producing a product down the value chain (like GLN might be). There's a premium for hydroxide/carbonate which LPI is producing. Also, you'll find many of those producers up top are using DLE from the get-go so will look way better on paper. Another will be LPI is only targeting 15k/pa on phase 1 and have no ramp up / details on future phases, whereas others will target some enormous yearly production figure and bring the $/t LCE down.
Essentially I don't think the graph matters much.
The only differences between GLN and LPI is the stated capex 400vs600, the cost/t 3.2 vs 3.7, and the production/yr 15k vs 20k. LPI is closer to production and has a smaller resource (but I am not sure Lithium will be that relevant by the time LPI has mined all its resource so the grade is probably more relevant).