Lara's 400* was followed by England being bowled out for 285, which would have been much worse if it wasn't for a gritty ton from Graham Thorpe. Lara's 400* wasn't following a massive score from England where average players were making double tons. If Younis Khan breaks Lara's record it'll still be a massive achievement, but I'll still see Lara's as a better innings. You've got to remember that Lara was batting against an almost identical attack that won the Ashes, with Flintoff, Jones, Harmison and Hoggard all in fantastic form.
An average of 40 overall outside the subcontinent proves he's nothing more than an average/good player. He's not worthy of breaking Brian Lara's record.