Okay so as stated by the developer of this tool, this tool is NOT to be compared to hammer as it simply cannot compare. This is true, albeit this tool looks interesting, I don't play Garry's mod sandbox anymore so I cannot say I will be trying this tool out. The main difference between this and Hammer is basically everything. This produces pre-made parts and can make arena's, bases, etc. This is made obvious just by the pictures provided, now HAMMER has much more to it than just copy paste and stick on a grid, although it does have that quite a bit too.

Hammer editor includes a powerful material editor/displacement tool, a cutting tool, magnifying, it's own three-grid system with a 3d view, a brush tool that comes with primative shapes (Defined as circles, wedges, etc, more of course are there than just those.) and comes with an entity tool. This tool compared to hammer has : One grid (I believe), and simple pre-made things. As I said, I don't know everything about the tool nor do I care to really try it out, but I just wanted to define some things. Excuse any misspellings and issues with grammar, I'm quite tired.


But in general, you can do much more advanced things with Hammer, and it's so simple to use, I'd never want to use anything else honestly.