I personally haven't used Bitcoin Gold. According to the stats I see on websites, I think that Ethereum is faster, as Bitcoin Gold only averages 121 transactions per hour whereas Ethereum manages 32,917 per hour on average.

I found these stats here: https://bitinfocharts.com/bitcoin%20gold/ & here: https://bitinfocharts.com/ethereum/

Although I'm not sure if it's because there just isn't enough transactions on Bitcoin Gold to test it at peak capacity or if it is due to slow transaction speeds.