As user @ftwl posted:$ROBO: expense ratio is 0.95%, which is the most expensive out of the three. 89 holdings, about the same as $ROBT (85). 44% holdings from US, 26% from Japan, 70% combined = 30% from other countries. $ROBO, Exchange Traded Concepts Trust ROBO Global Robotics and Automation Index ETF / H1 $BOTZ: expense ratio 0.68%. 28 holdings, the fewest of the three. (more concentrated/less diversified, although this is not a good or bad thing, just depends on your investing strategy). 50% of holdings from Japan, 27% US, 77% combined = 23% from other countries, the least out of the three. $BOTZ, Global X Robotics & Artificial Intelligence ETF / H1 $ROBT: expense ratio 0.65%, the cheapest of the three. 85 holdings. 56% holdings from US, 11% Japan, 67% combined = 33% from other countries, the most out of the three.ETF pending....TakeawayThe best play on AI is through Nvidia $NVDA, Intel $INTC, Cognex $CGNX. A commercial play on robotics is through iRobot $IRBT, whose shares just went on sale: $IRBT, iRobot Corporation / H1 $ROBO has a bigger market cap and a dividend. $ROBT has no advantage over ROBO. ROBO and IRBT are probably the best ways to play Robotics.