I've used Palisade several times with great results. Always as a finishing hop. I get honey/orange from them. I've used them in combination with Columbus as the bittering hop, threw in an ounce of Palisade (5 gal. batch), at flameout. Tasted a lot like SN Pale Ale.
No way they are a sub for Willamette.
Just try it out, that's the best way to find out if you. You can ask on the forum all day long, the only way is to try it out. Make a small batch if you're worried. Everyones tastes are different. What you like, a thousand other people won't. And they're usually on the forum and they'll tell you all about it!