Well i believe the most of bitcoin members are more interested into get bitcoins right now because the halving,but well both are good investment options but the biggest potencial is around bitcoin gold has had already its potencial limited or atleast looks like .
and goldenmaniac will be says " gold is best choice to invest our money" . in fact bitcoin growing so much gain from first time, and dold growing everyday by some precentage, for me both of them is good as investment.
and you can lose your money if whales dump bitcoin to under $200 again
bitcoin is high risk for long investment it's very diffirent with gold, where people use gold for long term investment.