I took some comparison pictures between the Olympus E-PL5 with the Olympus 40 – 150 mm, M. Zuiko F4 – 5.6 R lens, and the Fujifilm X-E1 with the Fujifilm XF 55 – 200 mm, F3.5 – 4.8 lens. The above images were made at the extreme long end of both lenses which is an effective 300 mm focal length. I then cropped both images down to what you see above which is not quite down to 100%. Both images were taken in the program setting and were handheld. They both were at f/8 and ISO of 200. The WB, exposures, and the black and white points were slightly different so I adjusted then to make them similar. The Fuji camera has an APS size sensor with no filter. The Olympus is a micro 4/3 sensor (smaller) with a filter. Both images were taken in raw format and processed in LR5.
The Olympus combination weights 535 gm and costs (22 May 2014) $698. The Fuji combination weighs 950 gm and costs (22 May 2014) $1268 and is much larger in size. The difference in just the lenses is even more extreme. The Olympus lens cost $199 vs. the Fuji cost of $699. The image qualities are different but I will let you decide whether it is worth the difference in cost and weight. To be fair you have to realize that this comparison was made under ideal conditions. I will also have to compare them under low lighting conditions. Under that situation I expect the differences to be more pronounced.