Bitcoin Gold Overview
The Bitcoin Gold cryptocurrency focuses on decentralized mining, via the Equihash proof-of-work algorithm, fair distribution, replay protection, and open source transparency.
BTG has the same supply as Bitcoin and Bitcoin Cash (21 Million), but differs because it uses proof of work via Equihash, so normal users can mine with GPU miners rather than needing specialized ASIC miners like the big BTC shops. Block intervals are also the same as the other two cryptocurrencies (10 minutes). Block size is the same as bitcoin, but different from Bitcoin Cash. BTG also adjusts difficulty every block, rather than every two weeks like the others.
The Bitcoin Gold team states that the purpose of the currency is to "make Bitcoin mining decentralied again" by moving away from SHA256 and allowing more users to have access to the opportunity to mine it.