Mostly the same, but these things have been changed.
SHIPYARDS - Cruisers in improved shipyards are now 9 instead of 10
Heavy bombers have been clarified to say “strategic bombers” so as to clearly exclude tactical bombers
ROCKETS -
Rockets have been changed to fire from airbases instead of AA guns
Rockets can fire 4 spaces instead of 3
Rockets can damage bases - before it was just IC’s
A single facility can be targeted by multiple rockets per turn, also!
IMPROVED MECH - Improved mech can now blitz without tanks
I think that is a complete list of all changes. You can compare the 2 rulebooks now to make sure.