Dear Flyer, 
Having been a combat pilot and civil pilot it's pretty safe to say that it won't be like the actual aircrafts characteristics, especially if it is a fly-by-wire aircraft. However what some of the developers have done is incorporate as much realism to the flight models. Are they difficult, yes, for me the most realistic models are from Vietnam back and they indeed are bears to handle. So you get one scarey ride, one bcause noones flight controls for computers will match the actual and two, because of the afore mentioned issues of flight model building. But overall they are as real as you will get. The only other flight models I have found which give the most realistic handling are from Oleg's Il-2 series. So enjoy the sims at whatever reality setting you like knowing that the people who engineered the models did their best to give a realistic feel for what those aircraft would act like. Good flying............