I didn't compare them but they do have different targets. Tact wants a flat response at the listening position. Lyngdorf wants your speakers response (without accoustic influences) at the listening position.
I don't know how the tact system works but I do own a Lyngdorf TDA2200. This measures in your listening position as wel as random spots in the room.
I don't know how the tact system works but I do own a Lyngdorf TDA2200. This measures in your listening position as wel as random spots in the room.