I think ZEST carries better VFM. Same FIAT engine, 90 bhp on AMT. 22-24 kmpl on highway practically. Better leg room. High seating. Better boot space 390-400 ltrs. Better dashboard and steering design. Better infotainment (by HARMAN) with 8 speakers. Nice suspension. very low NVH levels. Better road holding and drivability (approx 100kg heavier than dezire). ABS, Air Bags, Corner stability program etc.