It makes quick work of generating the exact model geometry you need, and parametric geometry makes quick work of design changes. The SOLIDWORKS User Interface is highly optimized for modeling, with slick contextual menus and intelligent sketch snapping and dimensioning.These tools don’t typically compete on features unless you happen to fall right in the sweet spot between their respective primary capabilities. Keep in mind, these are two very different tools that are considered the leader’s in their respective markets. So, let’s compare the two programs to see how they stack up on a variety of topics. So, when do you use one or the other and do you need to buy both? The easiest way to describe which tool you should primarily use is to ask yourself if you are a “designer who also needs to program some parts”, or if you are a “machinist who is modeling parts to program them”? However, even that fails to capture the question in full and how it might impact your daily work. Both can create model geometry, both can generate NC code, and both have additional unique capabilities that might make it a compelling choice for you. I often get questions related to using Mastercam or SOLIDWORKS for a given task because they overlap in a lot of what they do and not everyone can learn or even afford to buy both tools right away.