Nice. I like the specular highlights that turn up on the otherwise black patch on the frogs back in the diffused example and that the highlight on its nose isn't so harsh.

Just make sure you don't leave your paper too close to the light unattended! Parchment paper (the usual cooking kind) is a more heat resistant option. Also note that most household diffusion options will change the colour temperature of the light. Easily correctable if you are using only one light source (your cameras auto-white balance will usually compensate) but can be noticeable if you are combining sources. "White" paper sometimes has blue in it to appear "more white" and can cool the light off, parchment paper (mine anyways) warms up the colour temp (mine takes a 5500K source down to about 4800K).