Qualcomm Snapdragon 435 Advantages
Better graphics card performance FLOPS (0.0432 TFLOPS vs 0.0288 TFLOPS )
Lower TDP (4W vs 6W)
Qualcomm Snapdragon 429 Advantages
Higher Frequency (2000MHz vs 1400MHz)
More modern manufacturing process (12nm vs 28nm)
Released 2 years and 4 months late