IL4 will have more torque too.
I've got a rotax V-twin at the moment. I wouldn't say the has any more character than any of the IL4, v4 or parallel twins i've ridden. Most modern engine are devoid of character.
I have nothing against IL4's personally other than they are a bit characterless.
But if he's looking for inspiration when he goes for a ride, he stands more chance with a punchy V twin then ragging some I4.