I find Youtube a really good source of information to see how different Linux distributions performs today and how they looks like. No matter what distribution you choose, it does have the advantage that all software in it has been tested to work together. It is very rare (for Debian that is) you ever need to go out on the web to look for a specific software to download and install, everything is already there, you simply click and it downloads and installs.
To compare the above with any Windows system, you always needs to download software from the web, and you haveto put your trust in the fact that software has been checked for viruses, and sometimes it works out and sometimes it does not. Also it's common for software to come bundled with other software (take Adobe Reader for example) with additional software which you haveto unclick or in some cases it does not show up at all, and you get some extra software in your system which you've never wanted in the first place.
There's so much I could write about the + and - with both Linux and Windows, that I probably could write a short sized pocket book about it, but the most important thing is what you yourself need. For me I've used Debian since 1999 and it's in my opinion the most well tested distro and you can have a very old Debian system that you actually had for 10+ years in total and just make distro upgrades all the way, without ever replacing the hard disc or computer, that's pretty cool in my opinion. Most distros cannot achieve that, and the famous Ubuntu is a real joke if we're discussing a quality distro, but it's good for newbies as it's been for a very long time, and as a result, it became popular and also have many, many former Windows users which went over.
The choice should always be free no matter what you want or choose, as for what is best, the user decides.