Both will change the world of manufacturing
XONE doesn't impress me.
Sentiment: Strong Buy
I agree, howver xone is overprices for just selling 4 units in 2011 and 12 in 2012. When the price is sub $10, I am all in XONE.
They all impress me. But if I was really looking for diversification in the sector I would look more toward ONVO. All XONE is, is large scale industrial focused.