The Leica Digilux 4.3 is mostly gets compared to pro digicams and compacts. The Leica Digilux 4.3's top rivals come from Pentax (such as the Optio M40) and Leica (such as the Digilux 2 and the D-LUX 4)
Generally, some of the advantages of the Leica Digilux 4.3 compared to pro digicam competitors include: it is slightly smaller (mid size (78×98×33 mm) vs professional size (135×82×103 mm)), shoots faster continuously (10 fps vs 2.5 fps), is thinner (1.3" vs 4.1"), is slightly lighter (280 g vs 705 g) and has higher quality type of viewfinder (tunnel vs none).
However, on average it has a significantly narrower aperture (f/2.8 vs f/2), has a much narrower wide angle lens (36 mm vs 24 mm), has a much smaller screen (2" vs 3"), has a slightly lower resolution screen (130k dots vs 460k dots) and doesn't have image stabilization (none vs lens).
Generally, some of the advantages of the Leica Digilux 4.3 compared to compact competitors include: it has a marginally larger sensor (1/1.7" 7.6x5.7mm vs 1/2.5" 5.75x4.31mm).
However, on average it has a slightly smaller screen (2" vs 2.5"), is much larger (mid size (78×98×33 mm) vs super compact (97×58×18 mm)), takes slightly lower resolution photos (4.3 MP vs 8 MP), slightly lower maximum light sensitivity (800 ISO vs 3,200 ISO) and is older (september 2000 vs july 2007).