Investors & landlords

The Turbo Tax explanation reads as the 250 hour requirement must be met to claim the Safe Harbor QBID but not to elect to be classified as a qualified business. To be a qualified business it must be classified as a trade or business, the activity must be US based, and the income must not be wages. All of these criteria are met. I am not questioning how to classify. Rather, I am questioning why classifying one rental property as a qualified business would be beneficial for me tax wise and the other have the opposite impact; therefore, having zero impact on my taxes.