Well, it seems that his sundew has almost triangular leaves, while D. oblanceolata has more "oblanceolate-shaped" leaves.
Here's a picture of my D. oblanceolata as well for comparison:
leaf:
http://www.growsundews.com/sundews/oblanceolata/Oblanceolata_leaf-1.JPG
plant:
hi-res: http://www.growsundews.com/sundews/oblanceolata/oblanceolata_Sunset_Peak_HK.jpg
Here's a picture of my D. oblanceolata as well for comparison:
leaf:
http://www.growsundews.com/sundews/oblanceolata/Oblanceolata_leaf-1.JPG
plant:
hi-res: http://www.growsundews.com/sundews/oblanceolata/oblanceolata_Sunset_Peak_HK.jpg