I have held both GBG and SDL for some time now (making a heap at 250% on both thankyou very much). I think you are correct and it is worthwhile reading the SDL threads regarding a recent contribution on a mining magazine article comparing the future of suppliers of magnatite and heamatite. There is room for both over long/short term! Makes sense for merger incentive, especially now that RIO and BHP are causing ripples.
I would love to see SDL prove its potential and for GBG to resume merger discussions ... as will eventually very likely be the case under envisaged conditions. Why not cover both markets?
GBG Price at posting:
0.0¢ Sentiment: Buy Disclosure: Held