Can anyone please explain the differences GGP have VIL as a 50%...

Can anyone please explain the differences GGP have VIL as a 50% stake where as VIL have on their site 45% stake , & who is the promoter ??? Shouldnt they read the same

GGP website

Partners in the Fausse Point Project are:
Golden Gate Petroleum Ltd (ASX code: GGP) 20.00% WI
Verus Investments Limited (ASX code: VIL) 50.00% WI
Pass Petroleum L.L.C. 30.00% WI

VIL website
Verus has acquired a 45% Joint Venture working interest in the Fausse Point Exploration Project. Joint Venture partners include Pass Petroleum LLC (Pass) 27%, Golden Gate Petroleum (ASX:GGP) 18% while the promoter has 10%.
Just curious