So those are the two main commercial ones, you might want start with RC DeskPilot it's totally free and very good considering that it was made by a guy in his free time. Also the copy protection is really a pain for RealFlight if you want to use your own TX, I have mine plugged in tot he back of my laptop, after a few times when you crash you need to press a button on the dongle to reauthenicate, it's annoying. What I really dislike about Realflight is it just seems like a cash grab, add-on DLC is a huge problem where as Phoenix lets the users create their own planes and helis plus even offers them for download. Realflight has more instruction based content than Phoenix as well. Both have quadcopters, both can do FPV practice. Realflight 7.5 is also very good but worth getting above Phoenix only if you are in to the more niche areas of the hobby, Glider Towing and Slope Soaring, while Phoenix does Slope Soaring, Realflight's is better at it. I personally think Phoenix is great, especially as you are starting out, fairly priced also with life time upgrades. You will get many opinons of what is the 'best', that debate has been going on for a long time.
