Earlier TR's were a bit unreliable. They had a tendency to leak due to swarf in the lever and cylinders but have gotten much better in recent years.
The magura's are very solid and dependable but they will fail or break from time to time as they are not trials specific having said that ALOT of riders use them with no problems whatsoever.
The tolerences and finish of the echo's are of a higher standard but even they may go wrong from time to time.
The magura is significantly cheaper than the TR and performance wise there will be little or know difference in fairness
Its your choice though dude, in short..
Magura, cheap, safe, reliable.
Echo, more blingy and more expensive.