Other than the blue colour and price,  they are identical spec. and at the moment the deal is the blue one is less expensive from Thomann. I have no idea why anyone would think that there is no line out, even though it says "Line Out - No" on the "other info page", the connections are the same.   They even do a red version, which is very slightly more expensive than the blue one - may be they are trying to clear them from stock.