Once PLL has finished making the payments to be a 50% JV partner...

Once PLL has finished making the payments to be a 50% JV partner - roughly equally.

PLL along with A11 will each own half the resource, half the profits from the resource and will have direct control over half the production (at market rates). They will each be funding half the exploration and will share any additional capital costs 50/50. If Ewoyaa makes $100m, both A11 and PLL will gain $50m. The other Ghanian exploration areas are also inside the 50/50 ownership. When the mining licence is confirmed these percentages are likely to drop to 45%/45% but may drop to 42.5%/42.5% they however remain equal. 42.5% vs 45% depends on whether the Ghanian government/sovereign wealth fund becomes 10% or 15%.

However, A11 has 606m shares on issue (before options) while Piedmont has 1,801m shares on issue (if quoted in the 1:100th version on ASX).

This means that $1,000 invested @ 82.5c in A11 will gain roughly 3x the exposure to Ewoyaa that $1,000 invested @ 84c PLL would.

With a PLL investment you also get exposure to their other lithium projects which are covered in PLL/SYA threads.
With an A11 investment you also get the Côte d'Ivoire project but as minimally explored ground this is only a fraction of the A11 market cap.

Hope this helps