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 Canon ELPH 150 IS and Samsung NX1100 side-by-side from the front, back and top in their relative dimensions. Canon ELPH 150 IS has external dimensions of 95 x 57 x 24 mm (3.74 x 2.24 x 0.94″) and weighs 142 g (0.31 lb / 5.01 oz) (including batteries). Samsung NX1100 has external dimensions of 114 x 63 x 37 mm (4.49 x 2.48 x 1.46″) and weighs 222 g (0.49 lb / 7.83 oz) (including batteries).
Below you can see the front-view size comparison of the Canon ELPH 150 IS and the Samsung NX1100. Canon ELPH 150 IS is clearly the smaller of the two cameras. Its body is 19mm narrower, 6mm shorter and 13mm thinner than Samsung NX1100. As you can tell, actually this is not a fair size comparison since Canon ELPH 150 IS has a built-in lens but Samsung NX1100 doesn't. Once you put a lens on NX1100, its thickness will increase significantly.
Here is the back view size comparison of the Canon ELPH 150 IS and Samsung NX1100.
Now lets look at the top view comparison of Canon ELPH 150 IS and Samsung NX1100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 150 IS is significantly lighter (80g ) than the Samsung NX1100 which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on NX1100, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Canon PowerShot ELPH 150 IS (IXUS 155) nor Samsung NX1100 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 Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Samsung NX1100's 3.00" LCD screen is slightly larger than Canon ELPH 150 IS's 2.7 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.