.NET and Java validator comparison

We are in the process of comparing the Java and .NET validators to achieve better alignment between the two. As input we use: https://github.com/FHIR/fhir-test-cases/tree/master/validator

STU3 files:

Filename	Differences	Comment
bug824/bug824-resource.json	Java code thows errors about unknown extensions (should it?) and false codes from unitsofmeasure.org
bundle-documentation-miss-last-updated.json	Java throws warning about a code that isn't in the valueset (extensible), should we too?	separate rules defined from Bundle text
bundle.document.json	Java throws erros on not being able to resolve references, indead of warning in .NET	separate rules defined from Bundle text
qr-ex.json	"Unable to recolve profile" is an error in .NET and two warnings in Java
bad-display.json	Bad displayname, and code not in valueset, both warnings
message-infinite-loop.xml	.NET validator breaks at parsing, Java throws 22 errors about about extensions and codes, then 5 about bundle references
valueset-slicing-meds.xml	Values matched to multiple slices, but Java return 0 errors….
valueset-slicing-meds-bad.xml	Values matched to multiple slices, which is correct, but we throw two, while java only returns a single	No fix needed
qr-required-missing.json	Java validates QuestionnaireResponses to Questionnaires, .NET doesn't support that
bundle-ref.xml	Java Validator should throw "unknown unit", .NET just succeeds.
q-coepi.json	Parsing throws exception on "TODO", java validator also return 43 other errors.
nl/nl-patient-date.json	Fails on finding multiple profiles with the same canonical URL	Should fix in test engine