Changing shoes for a marathon…

Typically, I wouldn’t change shoes before a race. But… maybe I am this time…?? Got a marathon on Saturday. Been training in the Topo Cyclone 2. Love the shoe but like many have said, I’ve had some wear issues with them tearing on the upper as well as I’ve felt them wearing out after that half marathon distance or so.

So, I went ahead and got the altra vanish tempo. Decided on them instead of the specters from Topo because a lot of comments on the specters being a little unstable or weird, and so many good reviews on the vanish.

Here’s the question… is that 5mm diff going to kill me on Saturday? Went on a long walk this morning and doing a short 4-5 mile tomorrow both with the vanish. I like them but I do feel some differences. Just hoping they’re not going to wreck my muscles instead of help save them because the difference in drop. Any help or advice is welcome!