Idle Vibrations - Slight Rough Running Idle

[jsoto]

Next week, plan to swap cars and get some seat time in the X.

When in Idle, slight vibration can be felt through the steering wheel.
Also, the idle noise sounds like she's running a tad rough, but does not drive at all like she's running rough.
Once you get on the throttle, above 1K, the vibration in the steering wheel goes away *have to drive more to confirm, this was a quick observation on Sunday*.
The idle noise diminishes once in the throttle is applied, but I think this is more just due to roadnoise.

Any obvious deductions per the symptoms