For your consideration.
I have a question about the Sibelius influences. I found that the Christian Sinding's First Symphony is quite "sibelian", near to "Kullervo" opus 7. Sinding wrote the symphony about 1880-90, it was finished in the same time in which Sibelius and Sinding were close friends and partners in Berlin. All we know the influence of the Piano Quintet in e minor in the Sibelius Piano Quintet (I have the Pihtipudas Kvintetti CD, a good score!) but I don't know scholars opinion about the symphony.
We can hear sibelian features, specially the ones of Kullervo or the early Overture JS.145: major-minor-modal fast exchanges, pedal, obstinati, orchestration... Bruckner is also an influence in the Sinding's symphony (in Sibelius' early works too), but I believe that Sibelius knew the work of the norwegian composer, even the score, not completed yet.
"Sibelian" are, for example, these passages: the end of the development section in the 1st movement (obsinati), a passage with several violins solos in the 2nd movement.
Do you know the Sinding's symphony? Waht do you think about this questions?
Anyway, the symphony is very good and interesting, like a lot of works by this composer. A few of them are too much wagnerian (the 2nd and the 3nd symphonies seems almost a pasticcio with Der Ring quotes!, also the opera "Der heilige Berg"), but the more nordic works are wonderful! I suggest Sinding music for all the Sibelius music fans!