Unless these games are completely different on each platform, I doubt they would impress me. Granted, it can be done – Super Monkey Ball is a great example – but obviously, it's extremely expensive to do so.
The desktop version gives you an avatar to walk around with using the arrow keys, while the mobile version lets you slide across the map to view the level. Because of this, on the desktop version you walk over powerups to pick them up, and on the mobile version you tap powerups. And an enemy unit that just makes your own troops attack you on the desktop version both saps health and disables attacks on the mobile version. The experiences of walking around with your troops and watching from above are significantly different, but both are fun.
There are other differences. The mobile version has completely different levels from the desktop version. They also have very different stories – all the stories share is the events before the game. As a smaller detail, on the desktop version, you reorder units in steps with the arrow keys, but on the mobile version, you can just drag them.
Basically, Anomaly: Warzone Earth is a great example of how to do an Android port right. I don’t know if there’s a game in this bundle that is as well-ported, but if there is, then this bundle is worth getting.
Games (at least the good ones) are designed with emotions in mind - in fact, the ideal game immerses the player to such an extent that control differences become immaterial.
Arcade games that recreate the classic joystick and buttons on touch devices are often less than immersive. Games made for accelerometer or gyroscope input don't make much sense on a desktop computer. Games like Tetris aren't fun to use with a mouse. Etc etc.
No, but dismissing games because they're multiplatform does. Just because you have open source friends, doesn't mean you're not racist.
(Maybe you meant that you'd play them on your Mac and if they were designed for Android, then you're not interested because good touch controls rarely translate to good mouse controls. That's perfectly reasonable: The lead platform is usually the best place to play and not all developers put the effort into making good ports. But if you actually cared, you would have asked if these games have good mouse controls instead of being dismissive.)
As for the other kind of portage. I'm trying Dungeon Defenders right now on a Nexus 7 to see how they managed it.