Nah, Manning actually got charged with a lot more than Assange did; Manning was a serving member of the military and violated military law. And even in Manning’s case, the sentence was commuted to 7 years.

https://en.wikipedia.org/wiki/United_States_v._Manning

The trial on the 12 remaining charges began on June 3, 2013.[5] It went to the judge on July 26, 2013, and findings were rendered on July 30.[6][7] Manning was acquitted of the most serious charge, that of aiding the enemy, for giving secrets to WikiLeaks. In addition to five[8][9] or six[10][11][12] espionage counts, Manning was also found guilty of five theft specifications, two computer fraud specifications and multiple military infractions.[13]

On August 21, 2013, Manning was sentenced to 35 years’ imprisonment, reduction in pay grade to E-1, forfeiture of all pay and allowances, and a dishonorable discharge.[14] On January 17, 2017, President Barack Obama commuted Manning’s sentence to a total of seven years’ confinement. Manning was released on May 17, 2017.[15][16] On May 31, 2018, the U.S. Army Court of Criminal Appeals upheld Manning’s conviction of violating the Espionage Act of 1917.[17]

The expected sentence is probably about five years, whereas Assange has already been spent considerably more than that as a fugitive (and some of that time cooped up). US prosecutors apparently estimated that he’ll probably get between 48 and 63 months based on prior sentences.

The charges carry a maximum sentence of 175 years in prison, although Lewis said “the longest sentence ever imposed for this offense is 63 months.”