Here is my observation

NGC4490_4485_042015_comp1000.jpg
Location: Bavarian Alps, Germany
Date, Time: April 14 2015, 10:15pm local time
Conditions: seeing II (Antoniadi), SQML=21,4mag/arc sec2, very good transparency
Scope: Dobson Hofheim Instruments 300mm / F5
300x (Nagler 5mm)

Center of 4490 stellar, elongation appr. 3:1, mottled impression around the core, brighter area within the elongated end towards 4485.
4485 less elongated, no stellar center, seems slightly brighter at the end towards 4490.