When comparing Moai vs Roblox Studio, the Slant community recommends Moai for most people. In the question“What are the best 2D Lua game engines?” Moai is ranked 8th while Roblox Studio is ranked 11th. The most important reason people chose Moai is:
The Moai SDK Forum is active and users will go to great extents to answer queries, post code snippets, beta test, and even purchase and give feedback on each others' games.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Helpful community
The Moai SDK Forum is active and users will go to great extents to answer queries, post code snippets, beta test, and even purchase and give feedback on each others' games.
Pro Helpful and detailed documentation
Although the Moai SDK is very advanced and uses complicated features, the documentation wiki thoroughly and clearly explains how to use these features, such as the Moai Cloud(a service that provides web services for your game), and multiple ways to build from source.
Pro It's easy to use
If you want to find an object in the workspace just use workspace or game. In Unity (for example) it's much more complicated.
Pro Easy multiplayer
Multiplayer is set up on project load.
Pro Easy to use for children
It's the entrance to game development. But it will be likely, that you abandon Roblox as soon you turn old enough.
Pro AI Scripting
Pro No serverhosting required
Pro No website needed
Roblox hosts a very basic website to play your game for free.
Pro It’s fast
Scripting can take maybe only 30 minutes to get some real work going while others take hours.
Cons
Con Not for beginning developers
The Moai SDK has very advanced features which allow it to create powerful games. A drawback from this is that it is not very suitable for beginners.
Con No support for Linux
With the new-Bit client, Roblox went out of their way to make it impossible for Linux users.
Con No tutorial system in place to teach new dev's the basics
Con Can only be published on Roblox
You can't export your game to Steam, Epicgames, Snapcrft or Flathub.
Con "Potato Servers"
Roblox Servers aren't that good in performance. Also, a server can officially only handle 100 players at the time. They tried 200 player severs, but abandoned this idea.
Con Players need to be online at all times to play your games
Con Can't selfhost servers
You can only use the Roblox servers.
Con Can't post links in games
The Roblox TOS only allow Links to certain platforms like Guilded.
Con High tax rate
Be ready to give 75% of your earnings to Roblox.