Ask me in 2 months, and hopefully I'll have a full set and can answer more meaningfully.
For now - the conversations I've had and two CRI tests I have passed with two different examiners suggest to me that the standards of FI and CRI are similar, but the scope is far less for CRI.
If I instruct a PPL for tailwheel, a new type, a biennial, microlight differences, a lapsed licence, an NPPL(M)-->NPPL(SSEA) - all of which I've done: I'm expected to work to the same standards as an FI. But the FI has been trained to teach basic flying technique, and I have not - only to critique, use and improve it. Scope not standards in other words.
G