They are very similar, but not exactly the same. The E2E and L4 bodies are the same with the exception of the markings. The E2E has a Z52 lockout tail cap and the L4 has a Z57 clickie.
It's also worth nothing that there are 2 styles of L4 (also E2e and E2d) bodies. The "old" has flat sides, with the "new" having slightly rounded flats.