Replying to Salomon boot size help

I absolutely love my old Salomon Foil boots but they have definitely seen better days. I bought them used and I put an additional 5+ seasons on them. I thought about a new liner, but the shell is leaking and probably could use an upgrade anyway. My question is, do the SPKs fit the same as the foils did? Has anyone put on both? I am only asking because my local shop doesn't carry them so I can't try them on. My Foils fit beautifully and if the SPK or other Salomon boots fit the same as the foils, Ill look for some online.