EV 15"B vs Eminence Beta & Delta 15"

Hey....was wondering. Anyone trade out their Bag End Red 15" speaker with a EVB 15" er? Or...with the Eminence Beta or Delta 15? I've got a Bag End Red with the original Bag End speaker. All in great shape. Have been using it in town in small rooms/gigs. At times with a 6 piece band with 2 horns...slamming band. Wanting feedback whether anyone's tried either speaker in the Bag End Red and was there any improvement with punch/tone? Any recommendations that's worth doing? The Beta and Delta are $60 to $90 less expensive than the EV Bs. I'm using an old P Bass with La Bella flats with a Genz Benz Streamliner 900 watt head with this rig. Thx, TBone