Generally, some of the advantages of the Canon 3D compared to boutique competitors include: it has a slightly larger screen (3.2" vs 3"), has interchangeable lenses, has higher quality type of viewfinder (pentaprism vs digital) and has more storage slots (2 vs 1).
However, on average it significantly lower maximum light sensitivity (6,400 ISO vs 102,400 ISO), doesn't have a touch screen, it's body is not weather sealed, doesn't have a screen which flips out and is older (october 2012 vs september 2018).
Canon EOS RP
6 years newer
$1,299 - $1,699
Significant advantages of the EOS RP (vs the 3D)
- Has a touch screen
- Has a flip-out screen
- Better maximum light sensitivity: 102,400 ISO vs 6,400 ISO
Significant disadvantages of the EOS RP (vs the 3D)
- Built-in lens only
- Smaller screen: 3" vs 3.2"
- Has fewer storage slots: 1 vs 2
common strengths of the EOS RP and 3D
Canon EOS R
6 years newer
$1,994 - $2,299
Significant advantages of the EOS R (vs the 3D)
- Has a touch screen
- Has a flip-out screen
- Better maximum light sensitivity: 102,400 ISO vs 6,400 ISO
Significant disadvantages of the EOS R (vs the 3D)
- Built-in lens only
- Has fewer storage slots: 1 vs 2
- Has a digital viewfinder: Digital vs Pentaprism
common strengths of the EOS R and 3D
Fujifilm X100F
4 years newer
$1,050 - $1,299
Significant advantages of the X100F (vs the 3D)
- Supports an external flash
- Built-in flash
Significant disadvantages of the X100F (vs the 3D)
- Built-in lens only
- Smaller screen: 3" vs 3.2"
- Has fewer storage slots: 1 vs 2
common strengths of the X100F and 3D