Landing speed

Hi all,
have you noticed if there is a different landing speed for each aircraft or is always the same? I ask you that because I started to play few days ago and I havent noticed any difference between Hurricane and Spit (simulation mode).

In addition I'd know how complete the mission where I need to inspect all the airfield with a touch and go. I did it but it isn't completed. Do I need to stop my aircraft on the runway and then the take off? I tried simply touching with the landing gear and give throttle again but nothing.

thank you.