w995 has bigger screen and stereo speakers... w995 has a nice metal back cover... w995 has the best bundled headset so far... Kick Stand!? haha not to mention the 3.5mm headphone jack~ do more buttons consider as advantage?

c905 has a larger lens for more light(base on my noob assumption)... c905 has xenon flash~ c905 also has led flash for video~