Rectified Tile edges

[Gazzer]

The only thing I can think of is the use of a grout colourant but not sure if it would colour the edge of the tile though.

 

[macten]

Unfortunately it won't.
Maybe tile paint touched up on the edges - botch job potential solution though.

 

[Shyde15]

Photo 4 shows the good edge against the poor edge, if they all were like the right hand edge then it would look great.
Photo 2 shows how the white edges are seen. Photo 5 is the only good joint because both the tiles edges were vertical and has the same amount of grout as all the other tiles. I still think there's a problem with the tile

 

[John Benton]

If they are 60x30 tiles my guess is that the manufacturer also makes a 60x60 tile and that size has the bevel on all 4 sides. The 60x30 is just a 60x60 cut in half, and loses the bevel on one edge. May be worth checking.