I don't think that Vince would play around ruining his best designed speaker (IMHO). He uses same drivers and not much of improvement (no need to improve what's already perfect) on the rest of ultra-premium grade electronic components and wires. Have a chance for dealer demo who will be able to show the speaker 'behind the scenes' and you'll be amazed what kind of quality components this speaker have. Some of dealers will unscrew the woofer and/or crossover to show you that unbeat built quality.
The Scanspeak bass-mid driver is modified by Totem to have increased voice coil travel, throw an increadible soundstage and deep bass compatible with large speaker.
The current model shows better efficiency by 1...2dB/W/m, but conservatively I'd rate them as ~83 db/w/m and forgive Vince for matching the rest of audiophile market.
You will need very powerful amp to drive them. I had them hooked up to Sansui AU-9500 for a while and that wasn't enough, so I caught a great deal on Sunfire 300 NIB and it was quite a change. Unfortunately I had to replace them more than decade ago with substantially larger foot print Aerial 10t due to the 14m.o. toddler who pushed and dropped Hawks a couple of times. The way they stand on their own 3 balls, you can blow an air on them to make them fall