Using vbindiff to compare the outcome on EFL/gstreamer 0.10 results in minor differences in the generated audio. Usually on all diff sites, it's just 1 value difference, looks like some rounding issue.
Closing this bug because the EFL port has been removed from trunk. If you feel this bug applies to a different upstream WebKit port and was closed in error, please either update the title and reopen the bug, or leave a comment to request this.