Volatility: Craps vs Blackjack

I have found volatility to be a broadly misunderstood concept in gambling. People think that if they sit down (for some meaningful period of time) at a $25 min BJ table with $400, they have a near 50/50 win/lose expectancy because they heard the house's edge is <1%.

Does anyone have some data/research that demonstrates which is more volatile: BJ or Craps. Without doing any math, I'm going to assume BJ is more volatile per minute played, just b/c more hands are being dealt (versus dice rolled in craps). That said, most players have more $ on the table in craps per roll (versus per BJ hand). So I don't know..

Thanks in advance!

No math to back it up but if you were to play $25 BJ and just $25 pass then I would assume BJ is more volatile. However most people in craps end up with $40 or more on a craps table even at a $5 table.