The documentation provided from the site https://iroha.readthedocs.io
highlight two different sections titled as Building Iroha and Quick Start Guide (which runs an example test version of Hyperledger Iroha). If any experts here could explain me on the difference between these two, I would be thankful.
Thanks!
Quick Start Guide provides instructions how to run iroha on docker - it is fastest and easiest way. On the other hand building iroha from scratch is not really complicated, because we need just to copy few commands, and almost all dependencies would be downloaded automatically by vpkg, or with cmake.
About other differences:
Personally despite all those disadvantages I prefer to build manually, because I prefer to compile on my system without extra layer like docker.