Possible Arbitrage Cometh ??

Just thought I'd add my musings comparing GXY & GMM's share prices

For ease of calculation i'm making some rather general assumptions and keeping numbers whole,
and yes, the sharemarket moves in mysterious and often illogical ways.

Let's assume GXY's Sal de Vida project is currently worth $100m
GXY SOI C. 1 bil so market cap at a SP of 19 = $190 mil
GMM SOI C. 300m so market cap at a SP of 28 = $85 mil

If we subtract Sal de Vida $100m from GXY we end up with similar market caps.
So assuming positive things happen over the coming weeks & months and GXY SP increases 50% to 28.5, IE
market cap $285m . if we subtract $100m , leaves GMM with a possible market cap of $185m, which = SP 61

So GXY increases 50% but GMM increases +100%.....something to think about ?