I am not sure what one is more advanced, I own a lot more Byteball than IOTA for several reasons:

• I am not convinced DAG is the way to go for internet of things. I have seen functional testnet demos of Raiden on Ethereum handling IoT stupidly high tx counts, far beyond what IOTA can attain.
  
  I do not think that DAG's future is in competing with Ethereum with machine to machine value transfers. I just cannot see how they can hope to compete. (Unless they also add state payment channels)
  
  However I see Byteball being competitive due to its focus on being the leading DAG crypto for the use by people and value transfer. (I think byteball has correct focus, IOTA does not.)
  
• Tony's method of distributing Byteballs has been genius.
  
• Tony isn't a jerk, I have seen multiple devs for IOTA act like childish jerks.
  
• Actually not sure if IOTA has smart contracts, but one of the big reasons I got involved with byteballs is because of Tony's smart contract system.
  

My current question to Tony is this: can Byteball actually scale as a DAG crypto? IOTA's network has already slowed to a worse state than Bitcoin, and that is saying something.