hits 4k with 27236 spell power, 0 procs
with 40k spell power (550ilvl) and no procs this becomes 4k diference on dmg (8k when it was 14k), with procs becomes 10k diference on dmg (13k when it was 22k), so yes, 10/10.
The logic is that appart that is alot of dmg diference (almost 50% of his dmg scaling), it was blizzlike dmg formula before a random nerf.