The Haug cd with the Symphony 1 was one of the first I bought and an impressive piece. the 2nd occupied a different sound-world, so I wouldn't accept the premise J puts forward for him. Eklund does seem to have a distinctive sound world, haven't caught his 1st yet, but both the 3rd and 6th are striking pieces, while I'm still getting to grips with his 5th.
I'd fully admit that my statements are arguable, - vis-à-vis both family resemblances between Eklund & Haug, and the claim each of their 1st Symphonies are paradigmatic.
Still, I think there's merit enough for consideration, in the process of which we can hone our perceptions. I could now agree with "the Addict" that Eklund's sound world can be
noticeably more hard-edged and agitated than Haug at times.
Eklund's 1st Symphony is easily heard on YouTube, and for me holds together better and grips me more decisively than the others I've heard, - perhaps eight of them, all told.
Would like some other commenters here to give it a listen and offer their evaluations.