While the 20.01 Mosaic has
link a Mosaic, laser-etched transparent dial, the new 20.01
link Series 2 has an opaque Mosaic dial.
link The Series 2 also adds tachymetric and pulsometric scales (a tachymeter measures units over time, such as miles or kilometers per hour; a pulsometer is used to measure heartbeats per minute, via the pulse).
link