Is your front grill just the honeycomb look or does it also have the horizontal lines across it?
It as the honeycomb look and as Zander said, the grilles on the LX and Ti are the same. The SSS grille is the same except for SSS on the grille.
The series 2 grille has horizontal lines.
Interior of the LX and Ti are very similar, checked out a Ti at uni today, and apart from the woodgrain on the dash, the interior was pretty much exactly the same as the Ti.