Rust vs Spore
Rust
Rust is hardcore survival game where the only aim for every player in the game is to survive. Being a survival game, your character will have needs that you'll need to fulfill or risk getting ill or worse... dying from it. There are tons of recipes for you to craft a wide variety of items from as long as you've got the resources you need, and you can also hunt and built a shelter.As fun as this game may sound, the community in this game can be a bit toxic. Most players have a kill-on-sight policy (even if you're naked and literally have nothing with you) and this means playing alone can be very frustrating. If you're planning to play this game, you might want to get a larger group of friends - maybe somewhere around 5 or more players - or you'll quickly realize you want your money back now.
Spore
Spore is a pretty unique and addictively fun god-mode-like sandbox game where you get to create a whole new world and fill it with your living creations. As a "god", you can play around with the game's five evolutionary stages, from Cell to Space, and grow an entire space-faring civilization from its very simple beginnings as a single-cell organism. Of course, to develop a civlization, you'll need plenty of tools to help them along and Spore gives all of that to you in an easy-to-use format. You can literally customize everything you like in the game ranging from vehicles that your creations will drive or even buildings that your organisms will live in.Although Spore is essentially a single player game - after all, there can only be one almighty god... and that's you! - the world you've created is shared with other players in the game, so your creations can actually explore new planets and maybe even bump into a hostile race which will force them to make the preparations needed to go to war.
Overall, Spore is an amazingly detailed, civilization-building, sandbox game that allows you to micromanange almost everything if you choose to do so, or you could lay down the groundwork and let things unfold by themselves. Best yet, there is no limit as to how many worlds you can create, so unleash your creativity and your godly powers and develop the ultimate civilization today!