Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Fujifilm XQ1 and Pentax E90 side-by-side from the front, back and top in their relative dimensions. Fujifilm XQ1 has external dimensions of 100 x 59 x 33 mm (3.94 x 2.32 x 1.3″) and weighs 206 g (0.45 lb / 7.27 oz) (including batteries). Pentax E90 has external dimensions of 102 x 59 x 25 mm (4.02 x 2.32 x 0.98″) and weighs 145 g (0.32 lb / 5.11 oz) (including batteries).
Below you can see the front-view size comparison of the Fujifilm XQ1 and the Pentax E90.
Here is the back view size comparison of the Fujifilm XQ1 and Pentax E90.
Now lets look at the top view comparison of Fujifilm XQ1 and Pentax E90.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax E90 is significantly lighter (61g ) than the Fujifilm XQ1 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Fujifilm XQ1 nor Pentax Optio E90 provides any type of weather sealing in their bodies, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Fujifilm XQ1's 3.00" LCD screen is slightly larger than Pentax E90's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.