On the measurements a 160 is shorter than a Five size for size (I think).
I’m 5’11” to 6″ depending on whether my darling sons are sleeping through or not, with a 32″ leg and I went from an 18″ Five (90mm stem) to an 18″ 160 (60mm or 75mm stem). I prefer the fit of the 160 which does feel slightly longer in the frame.
If it helps, I also ride an 18″ 456 (75mm or 90mm – 90 better), a large Pegasus (70mm stem) and a medium PlanetX Pro Carbon (110mm) the last of which is a tad small. The Pegasus and 160 are the best fits for me.
edit – where you based Grantway?
vvv edit 2 – Reverbs r goood vvv