Olympus 7-14mm or Panasonic 7-14mm and whose camera?but planning on getting the 12-40 and also 7-14 to have a play at a bit of landscape work over winter.
If you have Olympus body Lumix G 7-14mm isn't exactly best choise.
Panasonic skimped in AR-coatings of that lens and they turn reflective around 410nm wavelength resulting strong internal light reflections between lens elements.
Panasonic bodies have very agressive 420nm UV cut filter in sensor's filter stack which filters those wavelengths, but Olympus uses more standard 400nm UV cut filter
New (also weather sealed) Panasonic Leica DG 8-18mm avoids that if you want to stay at lighter weight than Olympus 7-14mm.