I dunno, I've never seen that armrest trim (with wood, brushed metal, and chrome surround) in an Esky ... I've seen the Platinum one which has no wood, I''ve seen armrests that have just a wood strip and no cavity.
If we knew what trim it comes from it'd be easier to tell ... although I suspect it will be different. Plus I think (not sure) that Eskys have actual wood trim and not mock wood weakness. Also the armrest inserts aren't always interchangeable in these trucks ... that was a $100 lesson for me after I tried to insert a re-dipped Denali armrest into my Tahoe armrest. Long story short, don't bother.