[Sabaka]

Personally, I find little difference between the two. I started with SolidWorks, but my team switched to Inventor a year or two ago. I found it incredibly easy to switch between the two.

As far as differences go, they both have more or less the same features, as can be expected. I will admit that I don't use most of the more complicated functions, I have self-taught myself while working in the machine room half or more of the time (also being the lone member of the CAD team for most of the time). I have almost no time to learn anything, so, as it follows, I haven't learned much. So I can't vouch for differences in that area.

Reasons to switch: It's the industry standard, as has already been mentioned. Most colleges and universities will be using SolidWorks as well. Perhaps it's higher quality. I'm not convinced on that, though.

Reasons not to switch: There isn't terribly much difference between the two programs. When it comes to FIRST, I don't think there's a whole lot you will gain by using SolidWorks over Inventor.

My two cents.