The IRI course and the removal of the Instrument restriction are the same course.
No they are not.
IRI course is made up of;
25 hours Groundschool
and
10 Hours Flight Training
For an FI to remove the restriction requires;
JAR-FCL - 5 Hours Flight Training
UK - 5 Hours Flight Training and 10 Hours Groundschool.
Seems that while JAR-FCL gives the FI full credit for the teaching and learning aspects, the UK does not.
Personally, I find that most candidates require a bit more than the 10 hours to get all the explanations and briefings correct so the difference is immaterial.
I think that you have read the following but not noted that it applies to teaching for the IMC rating.
Originally Posted by LASORS
In the UK, the
same (IRI) qualification course is also used to remove
the “No Applied Instrument Restriction” from a UK issued
Flight Instructor rating which may be used to teach for
the UK National IMC rating.
Regards,
DFC