Orphan's Benefit Comparison

Here's a side-by-side comparison of "Orphan's Benefit", a black-and-white ∂isney cartoon made in 1934 (left), and then remade in color 8 years later in 1941 (right).
I don't understand why they did this. Why would they put so much time, money and effort into a remake when they could use that same energy on making something original? Was it because of the big Disney strike that happened a few months earlier? Were they planning a package feature of remade shorts which never fully came to fruition? If anybody has any information on the history of this, I'd love to know more.
I apologize for the interlacing issues in the video. When I get the chance, I'll reupload a better version.
THIS IS TO BE USED FOR EDUCATIONAL PURPOSES ONLY