So, now that both are over - which Gordon-era tale of Bruceless Robins did you prefer?
Both are definately imperfect items - and "Robin War" suffers specifically for ending on a cliffhanger that we haven't seen addressed at all - and both are guilty of sidelining characters who should have had a larger role.
BRE makes a commendable effort to introduce new villains and characters - Mother, Orphan, Sculptor - but, unfortunately, not a one of them is especially interesting. Whereas the Owl involvement in Robin War comes with some great iconography, and the return of Lincoln March, both previously popular elements. But there's not a lot too them - the Talons are footsoldiers now, and March steps out of nowhere towards the end of the event.
Both do a pretty good job with Damian - his scene in BRE where he sets the other Robins straight is a bit of a highlight, both for himself and for the clear emotional growth and openness of Bruce between the time spent training Dick in the flashbacks and his time training Damian more recently. Whereas Damian walking into a self-sacrifical trap in Robin War because he's taking Batman-sized responsibility onto Robin-sized shoulders is tragically believable and in character, as is it's place as the bait to give the Owls ownership of Dick.
So, what do we think? For me, Robin War has the edge. I came out of the final issue with greater affection for Duke Thomas, whereas I probably liked Harper a little less by the end of BRE, and although Tim and Jason are sidelined in both - their escape from the cages in Robin War has a kind of ridiculous joy to it that was lacking in their fairly irrelevant Bane/Azrael subplot. Dick is a fairly bland "pleasant person" in BRE, finding himself positioned as the lead but not actually taking much action by himself - and worse, often used as base for Mother or Harper to monologue about their own importance and significance. Robin War shows us Dick betraying his friends and manages to make it seem in-character, which shows a greater courage in writing.