Oh really? if this from an online source that'd be great
What would be the best "succession" of leaders for A-H from 1870 to 1910? (If some of OTL's ineffective leaders die off or etc in TTL, that is)
https://en.m.wikipedia.org/wiki/Economy_of_Austria-Hungary While everyone and their mother knows about how reliable wiki is, this article is well-sourced and quite detailed.
As for leaders, well... I'm not sure. The basics are fairly obvious: keep Hötzendorf away from the Army and Franz Ferdinand from the throne.
Andrássy Gyula was a great diplomat and foreign minister, but the occupation of Bosnia proved very unpopular at home. It would be great for him to keep his post and continue keeping A-H away from international isolation, but making the occupation acceptable to Hungarians, keeping it from happening in the firdt place through making the Andrássy Note succeed requires significant butterflies.
Otherwise, maybe Count Hohenwart is successful in elevating Bohemia and federalising the Austrian part of the Monarchy. It's possible, but there is significant opposition. Either way, with more autonomy, it's possible that Bohemia is able to invest more into its own industry and prosper earlier.
Finally, there's the question of Galicia. I have no idea whom could have enforced this, but iOTL Vienna avoided investing too much into Galicia and it remained a relative backwater to the rest.