Son House, “Walkin’ Blues” and Elvis Presley, “Blue Moon of Kentucky”

The blues had a profound impact on early rock and roll. With this pair of songs that include one blues and one early rock and roll song.

Identify, list, and describe in as much detail as possible two musical elements (e.g., instrumentation, form, subject of the lyrics, or vocal delivery style) that the two songs in each pair have in common, and two elements where they differ.
Son House – Walkin’ Blues

Elvis Presley – “Blue Moon of Kentucky”