nex5 rely on software / menu to change settings. some find this cumbersome to navigate, especially you too familiar with manual controls. nx10 does provide the compactness + full manual controls. for street photography, it quite a good camera (for its size).
compactness is catching up trend nowadays! its give people the features of DSLR but minus the size and weight!
like many said, depends what you type of photography you are taking, then choose the gear to suit the need.
so which one feel better in your hands? technical speaking, the sensor size in NX10 is larger than EPL1. Would you want the EVF? IMHO, quite useful during sunny day! But AMOLED should able to handle it.
dont worry about who has more lenses ... you probably dont use more than 2 for daily usage!