@Rob,
This question really boils down to ‘10x faster than WHAT?’. Just like with any product, when you see something on the label like:
, you need to find out what the comparison is against.
Step #1 - Choose some engines/sdks for comparison.
Some possibilities are: Cocos2D, Cocos2D-X, Torque 2D, Love 2D, Unity 3D
Step #2 - Choose a comparison work environment. i.e. Are you an OS X, Windows developer, or Both?
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Windows: Cocos2D-X, Torque 2D, Unity 3D
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OS X: Cocos2D *, Cocos2D-X, Torque 2D, Unity 3D
Step #3 - Choose a target OS.
- iOS: Cocos2D, Cocos2D-X, Torque 2D, Unity 3D,
- Android: Cocos2D-X, Unity 3D
Step #4 Answer these other questions:
- Does the engine/sdk support all the ‘features’ I need for my app/game?
- Does the engine/sdk support the (sound, graphic, data, …) asset types I have available, can make, and/or can buy to make my game?
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Does the engine/sdk have a try before you buy or other low entry-price option?
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Do I know the lanugage(s) used by the engine/sdk (both programming and scripting) or do I have to learn it/them too? This definitely affects the 10X question.
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Many more …
Step #5 Choose some test cases for comparison. Once you’ve made it this far, you are ready to actually answer the 10X claim/question. The best way to do that is by comparing sample apps. i.e. Choose some examples of apps you’d want to write and compare the effort to make them using Corona SDK and at least one of the above engines/sdks.
I’m currently looking for some good examples, for comparisons, but I figured I’d post this and try to get back to you later. You could then grab some examples on your own and compare them.
Note: I hope this answer didn’t diverge too much from what you were looking for, but there is no neat-and-easy answer when comparing and choosing engines/sdks. In fact, I left out a lot of other questions like community size, availability of docs, company health, etc.
* Yes, I’m aware that you can find Windows frameworks for Cocos2D, but it is designed to be used under OS X with XCode.