IAS:

• IAS officers deal with Public Administration and Policy Formulation and Implementation.
• The training session for IAS officers is held at the Lal Bahadur Shastri National Academy of Administration (LBSNAA) located in Mussoorie, Uttarakhand.
• The topmost position of all the administrative services.
• Candidates who hold the topmost rank are allotted IAS.
• It has more powers than IPS officers.

IPS:

• IPS officers are charged with investigating crime and maintaining public order in the area where they are posted.
• IPS Officers are trained at the Sardar Vallabhbhai Patel National Police Academy (SVPNPA) located in Hyderabad, Telangana
• After the allotment for IAS is done other top rank holders are allotted IPS
• Second in Rank after the IAS
• It has less powers than IAS.

Hope, it helps!