Except both Icon and Star Trek have the same crosstie shape and no-one really comments on those:-Alright then, if no-one else is going to have a look at this again (because it's been bugging me why they look so different).
They have also changed the cross-tie patterns. Previously they only had one diagonal (red) in between each vertical (blue), but now they have a double arrangement:
For reference (Time Traveler as I'm comparing Xtreme Spinners, dunno if Mack have updated their track style across the board):
Which probably explains why it looks so open compared to the older stuff.