Martin Offiah the flyer was born in 1966 and in the 1994 Challange cup he was 28 years of age and at his peak . A fact is that sprinter's peak is generally reached between 23 and 30 ,No way was Innes that fast, not even close. Yes he was certainly a gun centre once he worked out the differences between centre in union and centre in league, but skill was his main advantage, not his speed.
If you look at the footage of Martin Offiah scoring a length of the field try at Wembley in the 1994 Challenge Cup Final (Wigan vs Leeds), Innes was one of the Leeds players chasing him. Craig didn't get anywhere near Offiah, who wasn't even as quick as he was 3-4 years previously and its probable that both Saab and Koula are quicker now than Offiah was at his peak.
Martin was in a league of his own with his super speed
You are right HV8 Innes was not super fast but he was not super slow either from what I remember
Innes the dual international was a class player and the ultimate professional