On paper, yes. In practice, SD SoCs tend to perform better than MTK.
It's like comparing the very first Pentium 4 1.5 (1.5GHz) with the legendary Pentium 3 1200 (1.2GHz). The P4 may have a higher clock speed and might perform better on some benchmarks, but the P3 would still be faster in day to day usage!
Oh and... Mali GPUs on MTK chips are total crap!