Marshie - Yeah bud,its just the pic... the Wahoo's are a thinner profile bait ( when viewed from above ) than the Ulua which is a little more bulky up front, and obviously with the much squarer shape... they each have their own unique action, with the Ulua having a wider "roll" action, and Wahoo a tighter and panicked action...
The Ulua works well on long medium pace sweeps/strokes, and the Wahoo can be used with a quicker shorter sweep, which gets it skipping and darting under the surface then popping up and skittering...
They can both be worked this way, and both perfrom amazings, just takes practise to see which performs better for you....