What is the difference between ISCC and ACR software?

The ISCC makes use of technologies related to ACR (automatic content recognition technologies) to come up with a new short and generic standard identifier for digital content – but ISCC is not an ACR. The following table provides a comparison between the ISCC system and ACR technology.
ISCC is an open standard proposal
ACRS are mostly complex services \ operated with proprietary software
ISCC creates a short \ identifier string
ACRS do not provide a short, \ public identifier string
ISCC can identify digital assets \ in all media formats
ACRS is not an identifier \ but an identification system
ISCC is generated by a combination of multiple fingerprints and cryptographic hashing algorithms
ACRS works with large and granular fingerprints and special indexing systems
ISCC has near duplicate content-matching capabilities (lightweight fingerprints)
ACRS is developed for content matching, \ can match and compare assets and small chunks in great detail
ISCC cannot analyse content in detail
ACRS can compare assets and \ small chunks in great detail
A short identifier string can be stored \ in databases or on blockchains \ very efficiently
ACRS are complex systems that requires database indexing technologies and large storage capacities
The ISCC is optimised for the use \ on blockchains
It is not possible to easily store and \ openly provide large fingerprints
ISCC can easily be implemented \ in existing applications and services
Most ACRS depend on external services \ and cannot easily be implemented \ in existing applications
ISCC ensures interoperability of content-related processes across creators, intermediaries, retailers and other organisations, systems or repositories
Fingerprints are not interoperable
A short identifier string allows for \ automated machine-to-machine communication and transactions
ACRS do not provide a short fingerprint-based identifier
ISCC can be created by anyone \ with access to the content file
ACRS often requires using proprietary software and indexing/matching services
ISCC can be used for \ all media content types
ACRS are often optimised \ for specific media types
Source: ISCC Foundation (T. Pan, S. Posth)