"The CX-30 GS exchanges the Skyactiv-G 2.0L for the more powerful 2.5L engine and also trades the 16-inch alloy wheels for a larger 18-inch set. In addition to the GX i-Activ safety equipment, the CX-30 GS adds Mazda Radar Cruise Control with Stop & Go function (MRCC with Stop & Go function), Smart City Brake Support Front (SCBS-F), Smart Brake Support Front (SBS-F), Pedestrian Detection (forward sensing), Distance Recognition Support System (DRSS), Forward Obstruction Warning (FOW), Lane-keep Assist System (LAS), Lane Departure Warning System (LDWS), High Beam Control System (HBC), and Driver Attention Alert (DAA). The driver can appreciate the heated and leather-wrapped steering wheel and shift knob, while all occupants are welcomed by the dual-zone automatic climate control, rear air conditioning vents and rear privacy glass. "
just compare the spec sheets on their website to both years. There is no changes on the GS model other than the MSRP.
GX as it states has now auto on/off headlights and rain-sensing wipers standard
GS - no changes
GS with Luxury pak - no changes
GT - no changes but deactivation has been dropped, there will be a turbo version coming
AWD for 2020 was a $2000 option for 2021 it's a $1500 option
However prices have increased across the board, except the GT
2020 - $23,950 / $25,950
2021 - $24,550 / $26,050