You're surprised that a quad core 1.4GHz processor outperforms a dual core 1.3GHz processor?
I'm more surprised that they were so close....
Quad what core? ARM CORTEX-A9
Dual what core? ARM CORTEX-A15
Does clock speed matter? Not as much as architecture when they are clocked at nearly the same speed.
There is no "byte" in the SI. The question is therefore irrelevant. There's an IEC standard containing prefixes for 2^10, 2^20, 2^30 etc, and those prefixes are kibi-, mibi-, gibi- and so on. The SI officially references them, even if they're not strictly part of it.
"I may be synthetic, but I'm not stupid" -- the artificial person, from _Aliens_