I have found....
In a point to point link if I need the fastest I can I use ntreame.
In my opinion
Nstreame is faster
Nstreame will keep pings low (with polling) in a fully maxed out link
If the link is not maxed out no nstreame is better (lowering pings)
an Nstreame link is more sensitive to interference
an Nstreame link will disconnect/reconnect more often (see above)
Nstreame is fantastic on long links (20kms +)
I have perhaps 50 p2p backhaul links (all ROS) an use Nstreame on about 10 of them (the busiest ones)
I have tried nstreame on point to mulitipoint bad got less jitter etc with it off (30 clients)
Long story short..
Nstreame is good to squeese ever bit of speed out of a link but does have it's downsides.