Yes the pressure is on for ORBX to do MSFS version of their Melbourne Cityscape and Airport also.
I don't think it matters just drop your freeware in and let sort itself. Having said that if you do go the ORBX way, install using ORBX central to be able to get updates as they are available instead of waiting
for MSFS to update it in the store. Most of the sceneries that seem to get broken when MSFS has a major update and trust me there are a few, are freebies. Using ORBX installers is generally painless.
I am afraid I don't use freebies at all now as I find that most of them are less than stella.