TLC (triple layer) vs MLC (multi-layer cell, 2 bits per cell) is typically:
-Less endurant (less writes before it "wears out").
-Slower.
However, in everyday use cases like a typical SATA consumer-grade drive would be put through, the drive manufacturers have optimized most TLC drives so well that these are a moot point. Endurance will be still longer than you'll probably own/use the drive every day.
My 850 Evo (TLC) and Crucial MX100 (MLC) will trade most blows in benchmarks, with the 850 Evo seeming very slightly faster in every day use.