For the previous poster who didn't like the Learjet 25....I don't think the Learjet 25 is difficult, but it can turn around and bite you, very, very fast.
As for your paper, if you look at the Learjet family, beginning with the 23s, 24s, 25s, 28s, 31s, 35s, 36s.....You can see a development of an idea and the implementation of what is better. For example, the early Lears had the nac heat wired differently than the later models. The gear has, effectually stayed the same (thank you Switzerland). Always when you meet lear drivers, they also ask "what serial number" because the aircraft differs so much (different wing types, varying electrical systems [inverter systems] and even different engines CJ610 vs TFE731 [20 series vs. 30 series]).
Again, every pilot brings different experience and different skills to each aircraft. This will affect the comments from varying pilots because someone may consider Turboprop ABC extremely difficult while others will not. It is a very broad idea for a paper topic!!
Good Luck.