I removed it because the comparison should not be by the raw `ndarray` data for, e.g., `Quantity` columns. But I can instead try to rewrite these to use the `content` property if it exists.. 

Aside: this would be a very good example of why PR should not be considered complete without a test case that ensures the issue does not recur! More mundanely, mentioning those issue numbers in the comments would have been helpful... Would you have time to do a quick PR to add tests, and I'll rebase and make sure I pass them?