I cannot tell which version it is supporting, but I can tell you that the WLE1216v5-20 is running perfectly stable in it (as I have one myself and tested it in my MOX)
edit: I answer here also for your other thread - there are many users that already tried the WLE1216v5-20 inside their Omnias, just have a look here: Wlan 5g not starting most of the time
Internet connection speedtests show the maximum available troughput (in my Situation close to 100/40 Mbps DL/UL - that’s what my ISP is providing).
Data throughput will be better as WLE1216v5-20 is a 802.11ac wave2-card and therefore throughput can reach 1733Mbps (in real life something close to 1GiB/s) - but that depends highly on your client devices. What gets better is MU-MIMO. Range should be somewhat the same.
But please - just have a look into the thread (as it will at least answer the third of your questions) I linked and ask your questions there as maybe more people will be answering