the big question is really finding out if the new ones are 18v true active or 9v onboard pre. Im sure they would still sound good but will be marginally different than the Classics and will also make a difference if there is any (even slight) noise
I would also like to know if the tops are true tops and not a 'foto'-lamenate (not really a big deal to me, Im just curious)
Sweetwater listing has them as 18v. Here's the blurb
18-volt active electronics package
The dual active Peavey VFL humbucking pickups give the Cirrus 4 a powerful voice with a wide range of dynamic possibilities. The 18-volt preamp offers controls for volume and pickup blend along with 12dB of boost/cut for your bass, midrange, and treble frequencies. This is wonderful for either sculpting your signature sound or for being able to go from driven rock tones to round jazz-style sounds right from your instrument. The VFL electronics make the Cirrus 4 a great option for gigging bassists who need to cover a lot of ground
Pictures there show at least a 1/4" cap on the Oak & Walnut models. The Tiger eye has stained back and sides which suggest to me a veneer instead of a cap.