Yes, I've ridden both and the 405 is way better and what I own. The Hemlock is okay, but unremarkable, feels like any other four-bar imo and slightly dead feeling.
The 405 is short, chuckable and very, very quick. But honestly, you need to go and demo them both because what suits my style of riding won't necessarily suit yours and I'm biased and I own a Pace. He said, somewhat unhelpfully, but with a certain amount of truth :-/? sorry…
Joking aside, what I like about the Pace is that it's short, with a low front end, doesn't bob, accelerates faster than it has any right to, and likes being stuffed into things rather than sat on like a mobile sofa. The Hemlock to me felt more stable and planted maybe, but less lively.