The 2011 has not really-really 10 ports, it has two sets of ports, 5 Gigabit and 5 100 Mbit, check the block diagram:
so it depends on how your network is cabled, if everything is 100 Mbit any would do, if it is 1 Gbit you will need to choose which ports to use.
Then it depends on which device will act as router (the other will necessarily be setup as switch) and which kind of internet you have.
Of the two the L009 is a bit faster as router, so it makes sense to use it as router.
If your internet is delivered through ethernet, you could consider using a DAC to connect the two devices through the SFP cages.
About updating the RouterOS, it depends on which factory version you have, if it is below 7.12.1, you need to first upgrade to 7.12.1, and then update further to the wanted release (but the update tool should tell you that automatically).
The doubt is more if you want to update to latest/latest, currently 7.20.2 as there are reports about it having still some rough edges, very likely not affecting "normal" configurations, but in any case check the release thread before: