Hatton would have won a UD over Witter, he would have been caught by counters. But Hatton would have had superior volume landed. Witter would have likely made Hatton look bad and made him miss at times too.
Would have been an awful fight. Hatton was excellent at cutting the ring off and I can imagine Witter clinching and spoiling every time Ricky got close en route to a boring points win for RH, Ingle fighters were incapable of infighting, they were trained to move away once there opponent got close rather than stand and fight but Hatton would have continually cornered Witter into positions were he couldn't escape.