celestron c9.25 s-gt or Orion SkyQuest XX14i?

Hi , i am a second stage student in college of science , Physics Department , University of sulaimani
our college decided to buy a telescope and i suggested them to buy a Celestron c9.25 SGT or Orion SkyQuest XX14g GoTo ? which one is better to be used as a college telescope , specially to view DSO and planets details ?
my other question is that if the dobsonian 14' goto system tracks the object as the C9.25 does ?
i also have cpc 1100 in mind :)
which one is the best choise
thanks for help
ok i got it , but can you give me a clearance , how much the details and resolution is better in the 14" orion dob compared to c9.25 ?? and the difference of details also between cpc1100 and c9.25 , is it noticeable ?