18w discovery cones

yes they look the same but i have my doubts that they are, or can the differencies in voice coil size alone make this difference?

8424 cones are very soft near the surround, so soft that the cone distort when pushing a finger near the edge
 
I mentioned the breakup region, because that can be a sign of different cone materials or treatment.
The 8424 have lower xmax and lower breakup resonance, so it's more suited to midrange duty than for woofer/midwoofer task imo.