I have serious doubts that HP with a 20 higher BP is any good. Think about what each is hitting:
HP Ice: Hits Flygon, it doesn't matter
HP Fire: Hits Grass tyes weaker than Sludge Bomb or in sun, hits Abomasnow for 4x SE, so it doesn't matter
HP Rock: Hits Kyurem, which already shrugs off attacks as weak as that in the first place.
Tech is not worth it just for boosting hidden power.
HP Ice: Hits Flygon, it doesn't matter
HP Fire: Hits Grass tyes weaker than Sludge Bomb or in sun, hits Abomasnow for 4x SE, so it doesn't matter
HP Rock: Hits Kyurem, which already shrugs off attacks as weak as that in the first place.
Tech is not worth it just for boosting hidden power.