I think so they would. I have a pair of Raichle SB400 (?) (renamed Deeluxe) 26.0 boots and they were too big. Then I got a pair of Deeluxe Lemans (SB600?) 25.0 and they were too small... one thing is the shape of your foot... it you foot rounded (middle toe the biggest) or quarter-circled (big toe it the longest) - because the boot shapes are different and you might have to punch out the shell a tiny bit.
BTW, I also have very skinny ankles.