Can someone explain. which platform is more updated and accurate?

This is generally accurate - the value is going to be derived based on the "market" of buyers - since most buyers of SFR are owner-occupants and not basing price on rental potential, rents aren't going to be the source of value. 

I told him I'd gamble that there's no one who even knows that restriction exists to enforce even if an heir lived in the area...the way to legally eliminate them is either get the beneficiary to record a new document (possibly a QC deed) to eliminate their restrictions, or pursue a Quiet Title if you think the person is no longer around or their heirs are not identifiable. 

Any websites or apps you recommend on getting the most accurate data? 

If the OP didn't get a survey prior to closing, I suspect there may be an exception to coverage for any matter which would be disclosed by an accurate survey.

In essence, generative AI draws inspiration from diverse data inputs—ranging from images to text or audio—to craft entirely novel outputs, offering a tantalizing glimpse into a world of endless possibilities.Reshaping the Dynamics of Real EstatePrecision in Property Valuation: Generative AI is rewriting the rulebook on property valuation by tapping into extensive datasets to swiftly and accurately predict property values.

Just an FYI, I recent cold call campaign showed that REISkip is only about 20 percent accurate.

I am trying to learn how to properly estimate rehab costs and negotiate with contractors. I’ve heard a lot about contractors taking advantage and overpricing. Any advice would help. 

To get accurate and up-to-date advice tailored to your situation, it's highly recommended that you consult with a qualified tax professional who can review the specific details of your syndication investment, your financial situation, and the applicable tax rules to provide accurate guidance.

If it is accurate it would generate more income.