That is not what the TSB says:
"...The genuine Subaru alternative oil filter has some features that differ from the prior Subaru filter, requiring additional service procedures
for certain oil changes...."
Think whatever you want.
Apparently there's 2 sizes for the temp replacement filters. Make sure you are getting the correct size for your application.
Here's a link to a video of a teardown of the original Subaru Filter, the new Temporary replacement filter, and the higher quality Japanese Tokyo Roki filter that is used in the Japanese market for the same engines.
The differences between the temp filter is the use of metal end caps, the plastic e-core center support, and a square sealing o-ring.
OEM Subaru uses cardboad end caps, metal center support, and the rounded sealing o-ring.
There also appears to be a lighter relief valve spring in the temp filter compared to the OEM Subaru filter.
So, no legitimate reason for the whole "extra service procedures" nonsense.
If you want a better filter for your Subaru engine, but don't want to pay for an imported Japanese Subaru filter, go to your local Mazda dealer and buy an RX-8 oil filter, instead!