Gullivar Jones in "What Price Victory?" by Effinger/Morrow
"Only One is Human"
Reprinted from Tales of Suspense (Vol 1) #22
Earth has invaded Mars, but the Martians host a virus that is deadly to humans, and they mean to exploit it by sending a spy into the Earthlings' camp, disguised as one of the men. There is only one way that they can tell which of the two men is the human. 5 pages.
"For Whom the Drum Beats!"
Reprinted from Tales to Astonish (Vol 1) #22.
The jazz drummer was not as talented as his comrades, who got the solos and autograph requests. He resorts to visiting Madame Grimm, a voodoo witch, who reluctantly grants his request to be the world's best drummer, promising it will bring him no joy. The man finds that he cannot stop drumming, day or night. 5 pages