Both have the same type of reflectors available dependant on brand, same wattage/
voltage, same filaments for the most part, and for all intensive purposes same lamp life and
color temperature.
Luminous output is not listed as much but it seems to be in the 1,250 range for the FLE and 540 range for the ENX. There is /5 and even a /7 version of the ENX available, though they get the extended lamp life by way of raising the
voltage which will extend the lamp life but also lower
color temperature and luminous output further.
One thing you don't see much by glossing over the specifications is very important in difference between the two lamps.
First burn position. The ENX is
base down to horizontal burn position. This means any elevation over horizontal and even if normal horizontal burn position will cause the
filament to sag most likely and in the end cause premature lamp failure. Most other than Ushio FLE lamps are any burn position.
More important than this is the
focal length / working distance of the lamp in focus. Just as there is a difference between a MFL and NSP lamp in various
PAR, R and MR lamps, there is also this detail with this type of lamp. Not normally listed but in focusing the lamp
thru the lenses you need to be able to
bench focus it.
The working distance of a FLE lamp is 209.6mm where at that
point the beam crosses over itself. The working distances for a ENX is right about 299mm.
That's +3.5" of difference between the lamps in focus length and I doubt you can make that up with
bench focus. Nor given the cheaper lamp needs +3.5" taken away from it instead of added to it which you might be able to do, you cannot just
jack up the lamp
socket to get it back to focus.
Yes, the other lamp will work but you won't be able to
bench focus your
fixture.