Dear @cwasden ,Thanks a lot for your useful and constructive comments,
You pointed out the undetermined points in my project, I started to design the aircraft experimentally but only regarding and inspiring some elements which are used in some vehicles. I didn’t make these decisions at the beginning of the project. That’s the reason you have lots of questions about style or existence or low-high poly built and I totally agree with your questions and start to think about the answers.
I decided to evaluate my project with both styles in a different terms. Both projects should be exist in a real world. Stylized version should be low-poly and materials will be prepared in the substance (I already working on Substance to improve myself) I could decimate the polygon numbers at the end. Realistic version should be more detailed and with smooth faces also I imagine some environment object to import my models into it and present it as a scene,
Your Criticism was very helpful, Thanks again, I hope I could finalize my projects asap and I could hear more criticism =)