GAS is the token that is used to pay for transaction fees on the NEO network. The NEO platform uses two different tokens; GAS are used to fuel the network and give holders the right to use the NEO blockchain. Similar to Ether on the Ethereum network. Although it's possible to buy GAS on some exchanges, NEO token holders automatically generate GAS as the blockchain increases in size. 8 GAS are distributed for every 100 million NEO in circulation.

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Paypex is an Ethereum-based token and payment network. The token is traded on a limited number of exchanges. The company's marketing materials do not describe the technical advantages of the token, or the benefits that their technology has.