What is 'level' to a G1000?
Level flight just means not climbing or descending.  Where the nose is actually pointing is another matter.
The pitch you are seeing is the &quot;deck angle&quot;.  Pitch attitude is normally referenced to the longitudinal axis of the fuselage (and normally, the cabin floor or deck) relative to the horizon for the loading and speed you are at.
The deck angle will be the overall AOA of the wing for a given flight condition plus or minus the wing incidence relative to the fuselage. If the incidence is zero, meaning the wing mean chord line is parallel to the fuselage's long axis, and the wing is operating at a 2 degree overall AOA at that altitude and speed, there's your pitch attitude; +2.  I would expect to see at least a deck angle of a couple degrees when flying at 210 kt indicated in a jet, unless the wing had an incidence of several degrees.
Say the Phenom has a wing incidence of about 1 degree, and that the wing is actually working at an overall AOA of 3 degrees at 210kt; the resulting deck angle would also be +2.
In the Citation with the mechanical spherical attitude indicator with Flight Director, you have to allow for the parallax error due to the gap between the indicator and sphere if your sight line is off a bit, and perhaps the Citation II has a higher wing incidence, and along with a lower wing loading cruises with a lower deck angle of 1 degree or less. With a mechanical indicator it'd probably look close enough to 0 degrees to make that conclusion.