I have the 425s and think they are moderately stiffer than the T700s. I have the Palau heat molded power wrap liner with custom foot beds and use booster straps. I believe they have similar fit to the 325s, but I have not compared them directly. The toe box is a little narrower and the heel a little wider than the 700s.
I like the boot overall. I have used them for two seasons now and will stick with them for the foreseeable future. I did add the RAB springs to them, which IMO improves the performance of the boots. I never liked the 5 position lean mechanism in deluxe boots.