The first one introduces the concept of "Bonus Techs" to the game. Bonus Techs are techs are not researched directly, but instead are automatically acquired once all their prerequisites are met (in the same turn as the last prerequisite is researched).
Bonus techs appear in the tech tree and tech list like regular techs do, allowing the player to queue up all of their prerequisites by selecting them and clicking "set research"
The second mod makes it so that you need to research anti-missiles in order to get fusion anti-missiles or AM anti-missiles.
It adds two new bonus techs to the game: Fusion Anti-Missiles and Anti-matter Anti-Missiles, that each provide their respective anti-missile weapon. The regular warhead techs no longer provide anti-missiles.
The Fusion Anti-Missile tech is automatically acquired once Anti-Missiles and Fusion-Warheads are acquired, and the AM Anti-Missile tech is automatically acquired once Anti-Missiles and AM Warheads are acquired.
Because the techs do not cost anything to research, this mod does not affect the tech balance at all, other than making the core Anti-Missile tech necessary in order to use any anti-missile weapon.
