Differences : '72 - '74 & 2017
#1.Former CIA and FBI operatives connected to Nixon's re-election campaign arrested and convicted in the burglary. 
 #2.Four of Nixon's top aides, WH Counsel, Attorney General, WH Chief of Staff and Special Assistant resigned. Later
#3. Special Senate Committee set up to investigate and hired Cox as Special Prosecutor.
#4.NIXON refused Cox's requests, two subpoenas a court order issued by a Federal Judge to turn over tapes.
#5.Nixon continued to refuse subpoenas and court orders. Decides to have Cox fired.
#6. Nixon orders his Attorney General and Deputy Attorney General to fire Cox. They refused, both resigned in protest. Solicitor General Robert Bork, at Nixon's order, fires Cox
**The two resignations and firing are what is referred to as the "Saturday Night Massacre". 
#Trump fired the FBI Director after his testimony. He did NOT fire a Special Prosecutor. 
#No Cabinet members have resigned(yet)
http://www.cnn.com/2014/01/23/us/watergate/fast-facts/