MediaTek Helio G91 Advantages
Released 2 years and 8 months late
Qualcomm Snapdragon 778G Plus Advantages
Better graphics card performance FLOPS (0.8448 TFLOPS vs 0.096 TFLOPS )
Larger memory bandwidth (25.6GB/s vs 13.41GB/s)
Higher Frequency (2500MHz vs 2000MHz)
More modern manufacturing process (6nm vs 12nm)