Much more is a stretch. Iwobi was much better under Lampard and was good in his last 2 seasons at Everton, no denying he was pretty bad before that but there's a reason we got 20m for him, he was a useful player for us, going based on actually watching the 2 play I think Iwobi is the better footballer.
What's Harrison better at? please don't say 'work rate' like somehow Iwobi's work rate wasn't equally as good, this idea that Iwobi was lazy etc is a complete lie, his work rate was second to none towards the end of his Everton career and it played a part in helping keep us up.