[thexa4]

If you want multiplayer you're most likely better of with Unreal. Implementing multiplayer on Unity is possible but relatively tricky to get right.

Other than that, it really depends on your team.

[esistgut]

Unity is reworking the whole network stack and they did significant investments in this area. So at this point implementing multiplayer using UNET or external libraries is possible and tricky but it is not really a good or future proof idea.