I have tried many chempedaks and much more durian, and as much as I love durian (I ate only durian for about 6 weeks once), I would put chempedak and durian on a shared first place of my favourite fruits. I think when chempedak is not REALLY good it's really not worth it, whereas a durian that's not really good is often still quite edible. But when I get an really awesome chempedak it might win it from durian..
BUT, this is just my opinion and I will add that in the post. Thanks for your feedback!