Updated (May 2011): Compare the Canon Rebel T3i vs Panasonic Lumix DMC-G3

Canon Rebel T3i vs Panasonic Lumix DMC-G3

Winner
Canon Rebel T3i

51

Panasonic Lumix DMC-G3

40

Runner-up

Reasons to buy the Canon Rebel T3i

External mic jack
External mic jack
Record higher quality audio with a microphone
Slightly more lenses available
Lens availability
220 lenses
Full HD
Movie format
1080p @ 30fps
Flip-out screen
Screen flips out
Great for movies
 

Reasons to buy the Panasonic Lumix DMC-G3

Size
Really small
Standard size (115×84×47 mm)
Touch screen
Touch screen
Fewer buttons
Movie continuous focus
Movie continuous focus
Makes it easy to get in-focus movies
Thickness
Thin
1.9"

galleries

Explore our gallery of 50 sample photos taken by the Canon Rebel T3i.
Explore our gallery of 50 sample photos taken by the Panasonic Lumix DMC-G3.

competitors

Canon Rebel T3i Competitors

Canon EOS Rebel T6

Canon EOS Rebel T6

Entry-level DSLR

$310 - $549 body only

$393 - $399 with 18-55mm lens

Battery life Longer battery life
Weight Lighter
Screen flips out Screen does not flip out
Canon Rebel T5i

Canon Rebel T5i

Entry-level DSLR

$1,095 body only

$539 - $549 with 18-55mm lens

Touch screen Has a touch screen
Continuous shooting Shoots slightly faster
Canon EOS Rebel T5

Canon EOS Rebel T5

Entry-level DSLR

$337 with 18-55mm lens

Battery life Longer battery life
Weight Lighter
Screen resolution Significantly lower resolution screen

Panasonic Lumix DMC-G3 Competitors

Samsung NX200

Samsung NX200

Mirrorless interchangeable-lens

Screen type Has an OLED screen
Screen resolution Higher resolution screen
Touch screen No touch screen
Olympus PEN E-PM1

Olympus PEN E-PM1

Mirrorless interchangeable-lens

Image stabilization Image stabilization
Size Smaller
Touch screen No touch screen
Panasonic Lumix DMC-G5

Panasonic Lumix DMC-G5

Mirrorless interchangeable-lens

$864 with 14-42mm lens

Image stabilization Image stabilization
Screen resolution Higher resolution screen
Size Larger

discussion

Canon Rebel T3i
Rebel T3i
Canon

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Panasonic Lumix DMC-G3
Lumix DMC-G3
Panasonic

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Showing 2 comments

Carpandean (2:40 PM, July 28, 2011)
Also, I am curious about your scoring system.  Why does Popularity get a weight of 100 when comparing "recent digitals", but only 85 when comparing two DSLRs?  In fact, why does popularity receive such a high weight, anyway?  Popularity has a higher weight than image quality!  Most of the difference in score (70 of the 87 difference in raw score, or 30 of the 33 difference in reported score) here is due to the relative popularity of a very old brand like Canon vs. a relatively new brand like Panasonic.  If you want to put a score in for availability of lenses or service or some other result of that difference in popularity, fine, but just popularity shouldn't be worth more than the critical factors such as which takes better pictures.  If you take out the Popularity score, the Nikon D5100 stays at 100 (it is still top), the T3i is 90, and the G3 is 77.  However, even there, there are several factors that are, at least in part, due to the smaller sensor (e.g., low light performance, dynamic range, etc.), so it seems a little unfair (double-counting) to also have sensor size.  Basically, your scoring system all but guarantees that any MFT camera, even if it were made to outperform the Canon/Nikon cameras in every way, will be rated lower.
 
Carpandean (2:14 PM, July 28, 2011)
Uh ... you can no longer use Phase Detection vs. Contrast Detection --> faster focus anymore.  The Lumix GH2 and G3, as well as the Olympus E-P3, have demonstrated that Contrast Detection can be made to focus faster than Phase Detection.  Now, there may be some cases (e.g., low light) where Phase Detection still has an advantage, but in many cases, the G3 will focus faster and more accurately than the T3i.  Check out the numerous independent reviews that state this.