Casio is more on functions, design & durability. I do have friends who collected those expensive & flambuoyant looking G-Shock for the design & multiple functions. Since Casio watch doesn't have second-hand value, my friends don't expect to sell them for cash in future. They just wear their G-Shock collections based on the occasion or their mood. I personally don't collect that much as they do cos they're high income earners.
Is Timex in the same league as Casio? Honestly speaking, no. Casio offers wider range in terms of price, design & functions. Timex is like no 2 to electronic watch enthusiasts like me & my friends. Perhaps its because we're a bunch of 80s flambuoyant followers. In addition to that, Casio offers more different designs for different occasion/mood. People may say Timex also has different collections for different occasions/mood, but Timex distributors in Spore, Crystal Time
http://www.crystaltime.com.sg/brands-timexstory.html doesn't advertise much to gain our attention.
However, Timex does have its saving grace. For example, I like its Expedition range of electronic watches which I'm wearing occasionally. I also like the fact that besides Casio's Illuminator function, Timex has Indiglo function to match Casio's Illuminator.
For Casio, its possible to purchase from any price range,for example, $15 till few hundred dollars. But for Timex, minimum is $70 till few hundred dollars. That's the fundamental difference to me, Casio is way affordable than Timex.