I recently picked up a new pair of the Deeluxe 325 Track's to replace an old pair of red Raichle 325's (I believe these where the stiffest of the 325 series).
A few notes-
1. The new shells are WAY softer. Not a little bit, a lot of bit. This was good for me as after a few seasons off my legs are weaker and I use one boot for all my riding needs. Potentially tunable with different tongues, BTS, etc, but it's more the a subtle change. They also only come with one tongue
2. No rear spoiler. Not a huge deal, but with a Booster I can feel a difference.
3. The big difference for me was the lower heel cup. I've always had heel lift in old Raichle shells that I managed to keep in check with L pads and a little work. The new Deeluxe shells addressed this issue by completely beefing up the heel cups of the boots. For me they overshot the mark and I had major cramping in my heel and Achilles. We've since ground the material back to what I think will be a happy medium. I'm surprised to have not read about this change as it as a major difference in fit/ feel of the boot.
4. The new liners have some build in ankle pads, feel a bit softer, and have a sticky/ grippy sole. Not sure how they will hold up, but the feel is different.
Long and short- if you are expecting a 1:1 replacement you won't get it. I'm really happy with the boots, but in my case it did take (is taking) some boot fitting to get the "classic SB" fit. Softer shells, tighter heel area.