LCD
Both LCDs measure 3 inches and have 230,000 pixels; these specs are commonplace these days. That resolution used to be stretched across 2.5 inches, but since bigger is better these days the resolution is being stretched to 3 inches. This doesn’t make for as smooth a look as some previous screens – but the G9 and XSi are even in terms of size and resolution.

The XSi’s LCD screen is flush with the camera body, but the G9’s LCD protrudes very slightly. Aesthetically, the XSi’s looks better. Put them under the sun and the G9 can be more easily seen; it has an anti-glare coating that helps with this.

Many DSLRs have a monochrome LCD that sits atop the camera and displays current settings. This is not the case on the XSi, which has only the color LCD on the back. Thus, SLR users who are familiar with quick setting changes by rotating dials and glancing at the top of the camera may not like the Rebel XSi.
 

Canon PowerShot G9

Canon XSi

 Viewfinder
The Canon Rebel XSi easily wins this prize with its eye-level pentamirror optical viewfinder. It is nice and large and surrounded by a soft rubber cushion. It is 95 percent accurate. Now compare that to the 80 percent accurate “real image” optical viewfinder on the Canon G9. It is about a third of the size of the XSi’s viewfinder and gets more inaccurate as the lens zooms in. Its glass shows some softness around the edges and is surrounded by a hard plastic frame – no cushion here. To their credit, both Canons are poor-eyesight-friendly with diopter controls on them that range from -3 to +1.

Canon PowerShot G9	Canon Rebel XSi