I tried a few cedar topped acoustic guitars when I was in the guitar shop ordering my Custom Acoustic last year.....My impression was that wood was probably structurally stronger than Spruce but it seem to soak up some tone, much more than the spruce tops did. The best, most responsive type of acoustic top was the Engelmann Spruce, but because I wanted a jumbo sized acoustic it was recommended I go for the Sitka Spruce, as that had more strength. In summarey, the cedar was OK as a spruce substitute, but you might have to have a more denser body wood to counteract the 'soak' I mentioned. In a solid body it probably would act a fair bit similar to mahogany........because it is not as trebly acoustically, it might promote a more 'darker' tone than say a maple top.