The Casio XV-3 is mostly gets compared to pro DSLRs and mirrorless. The Casio XV-3's top rivals come from Fujifilm (such as the X-T1) and Canon (such as the EOS 1D X)
Generally, some of the advantages of the Casio XV-3 compared to pro DSLR competitors include: it is much smaller (compact (115×62×33 mm) vs large (158×164×83 mm)), is thinner (1.3" vs 3.3"), is much lighter (245 g vs 1,530 g) and has a built-in flash.
However, on average it records lower quality movies (320 x 240 vs 1080p @ 30fps), has a much smaller screen (1.8" vs 3.2"), takes much lower resolution photos (3.1 MP vs 18.1 MP), doesn't record movies in 24p and has a much smaller sensor (1/1.8" 7.18x5.32mm vs full frame 36x24mm).
Generally, some of the advantages of the Casio XV-3 compared to mirrorless interchangeable-lens competitors include: it is slightly smaller (compact (115×62×33 mm) vs standard size (129×90×47 mm)), is thinner (1.3" vs 1.8"), is slightly lighter (245 g vs 440 g) and has a built-in flash.
However, on average it records lower quality movies (320 x 240 vs 1080p @ 60fps), has a much smaller screen (1.8" vs 3"), takes much lower resolution photos (3.1 MP vs 16.3 MP), doesn't have a screen which flips out and has a slightly smaller sensor (1/1.8" 7.18x5.32mm vs APS-C 23.6x15.6mm).