Hello Dayan,
I'm sure I am not experienced enough to answer your questions, but perhaps some of the following may be useful to know while others far more experienced than me offer you meaningful advice.
What I would ask is, are you an "enthusiastic" driver and welcome road holding over comfort, or is the S Line of more interest to you than the SE due to the S Lines looks etc? I think thereby lies the answer to your question, and of course, you have to be the judge of this. Compromises are always necessary, but I really think it does boil down to which of the two is more important to you. I'm sure others will assist you much more than I once they know your preference.
On a personal note, I have a non-Audi sport variant (bought used) but I bought it due to its condition and equipment, and in preference, I would have preferred the non-Sport model if I could have found an equally nice one. My preference is for ride comfort rather than throwing it around corners, but in my case availability decided the choice.
I think you are very wise to seek good advice before committing.
Good luck,
Gareth.