>>4159318>>4159387the 18 is noticeably bigger on the xe4 than the 27, but it's still very small and easy to have on a neck strap or keep in a bag.
i have a few shots on that setup itt but i don't like them very much. idk if it was just user error but i couldn't get the image quality to look distinguishable from a mediocre cell phone unless i was like 3 ft or closer to the subject. as far as street shooting goes, that distance is too close for me to shoot regularly plus 28 equiv was a bit too wide. the distance limitation also rules the 18 out for landscape for me which is a big bummer because hikes are exactly where i'd want the small wide angle setup. i did find it worked well for taking pics while hangin out with friends indoors. inside+night applications are where the 18 beats the 27 imo but personally that's not enough to win the spot of daily carry lens over the 27. based on what you've said tho, it's probably worth trying out