The EV's are nice and light, easier to put on a pole... but they are a bit larger and harder to maneuver as a result, whereas those 12" Yamahas will take up less room in the vehicle.
In doing Indian Music shows here in the Twin Cities (mostly acoustic instruments in small halls - but we have played modern techno-influenced Indian music thru them too) the EV's always struck me as being a bit more diffuse than the other cabs I am familiar with. they're certainly less punchy than the Yamaha's my band owns.
I'd probably pick the Yamahas over the EV's based on the past few years of experience using both kinds of cabs... IMO plastic cabinets don't reproduce bass frequencies as well as wood ones do.