Devore O/96 vs Volti Rivals

Those speakers sound very different.  You need to hear them for yourself and draw your own conclusions.

What are some of the reasons why you are considering these two speakers (other than being listed on Stereophile)?

I demo'd the O/96s(with Line Magnetic components) and had the Volti Audio Rivals in my own system for a proper evaluation. Both are very good and enjoyable speakers...I can't see you going wrong with either, unless you have some very specific needs / preferences, which is the reason for the question above.

The O/96s are significantly higher than the Volti Rivals (list prices for each), unless you are going with a very custom finish for the Rivals.

Dig high eff? Ever heard Sonist Concerto 4 ? 

The Volti's are horns and O/96's are conventional box speakers as said above it's apples and oranges. Personally I've fallen pretty hard for horns but as with all things YMMV.

I will say no more then to look up the Pure Audio Project  Loudspeakers neo 15 with Voxativ mid- tweeter driver and 
Verastarr wire harness upgrade for under $8k a speaker that does everything well and st 95 db efficient.  The simple Leonitis 1 capacitor crossover is best I reccommrnd,and replaced capacitor myself no soldering just excellent Copper Gold plated board. 
Check it out ,I sold several Loudspeakers over $10k  .These sound like real music and just disappear. Any questions email me I have been in Audio since the 70s and know what Real instruments 
Should sound like . Not for head banger  jazz,rock symphony no 
Problem at real SPL- levels. A lot of reviews online .

I've got the LM508IA and it sounds fabulous with the Tekton DI speakers. Audio memories are fleeting but what I heard from O/96 speakers didn't seem so much better. My DI set up allbeit with room correction is good enough that upgrades are no longer alluring. The SE Double Impacts would be worth a listen.