Can someone make sure I'm understanding the spell Awaken correctly?

[tordirycgoyust]

The spell's description overrides logical and/or plausible arguments if awakened trees ought to have a Constitution score or not.

The line "except that it gains the plant type" implies that the specific rule that it has the characteristics of an awakened object does not apply to the general rule of plant traits. The need for a specific rule about senses is further, if minor, evidence of this.

EDIT: After some more thought, I feel the question is whether plant traits are added to, xor replace, construct traits, which I can't seem to find rules for.