I don't know how fast NEO's transaction speed is, so i can't comment anything but I know exactly about ethereum, ethereum transaction is not fast. Yes, you can make it fast but the fee will be so high too. Based on my experience waves is faster, i can't say this is the fastest, and don't forget waves transaction fee is so low, 2 Benefits of waves
NEO transaction speed is 15 sec (block time) as I said in the first place. I don't make lobby for NEO in here but one major benefit of NEO block chain are TX fees which are 0. Now it all depends what the OP want to accomplish with his cryptocurrency.