Resogun vs Sky Force Anniversary
Resogun
Resogun is a brilliant side-scrolling (in a spherical sense) arcade-shooter for the PlayStation platform. Being a shoot-'em-up, you can definitely expect a bullet-hell gameplay where you'll need to take on wave after wave of relentless enemies. The arsenal of weapons at your disposal is quite diverse as well, giving you access to cool lasers and even destructive nova-bombs that can level hordes of enemies at one go. The game also has a really nice sci-fi theme, brilliant graphics, and of course, superb sound.The best and most unique aspect of this game though is that each item, be it a enemy fighter, boss or simply an object, in the game is built using voxels and hence, you can satisfyingly blast your enemies into millions of bits and pieces. You can even take on challenging bosses cooperatively with friends in this game or test your mettle in the game's endless Survival mode, Demolition mode, Arcade mode and also the level-based Score Attack mode.
Resogun is among the best arcade-shooters that you can play on PlayStation 3 and 4 as well as PSVita, and if this sort of game is kind of your thing, you'll definitely not regret getting this game.
Sky Force Anniversary
Sky Force Anniversary brings Sky Force to platforms other than Android and iOS, namely PC and consoles, allowing even more players to enjoy its exhilarating arcade shooting action. It is basically similar to Sky Force 2014 on mobile and features everything you'd expect to find in the latter, including challenging enemies and bosses, large number of missions, weekly PvP tourneys, an in-depth airplane upgrade system along with a wide variety of planes to fly as and weapons to blast enemies into smithereens. In this version, you can also play the game cooperatively with a friend through the game's local multiplayer option.Oddly enough, despite its similarities to Sky Force 2014, Sky Force Anniversary is available on Android as well. Unfortunately, I'm pretty sure the game doesn't support cross-platform cooperative gameplay so you can't exactly play with your friend cooperatively if he is on the PC and you on your phone.
Sky Force Anniversary is the best (and only) version of Sky Force that you can get for Nintendo Wii, PlayStation (3, 4 and Vita), and Xbox Live, but if you want to play the game on your mobile, you can get either the Anniversary version (Android only) or the 2014 version.