I seem to be a minority here but my go to desk tamper is a Rattray's slim Caber. Pros: round concave foot makes mounding simple and easily clears excess cake from the bowl. Cons: the pick is a little fat, it has no scoop. Some people dislike threaded pipe tools, but at my desk this is not an issue, I often leave it open on the ash tray.
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I have both the Rattray and 8deco. I like them both. 8deco has the vented dome foot, while the Rattray doesn’t. I don’t really notice a difference when using though. 8deco also has the scoop at one end. The pick on the 8deco is rounded at the end and wider. The Rattray’s pick is thinner and sharper edged. I find the Rattray's pic easier to get into the nooks and crannies of a cob - especially when removing damp bottle or unsmoked tobacco. So from a functionality standpoint they both have their pros and cons. From a cost standpoint, the 8deco has the edge.
Personally,I love the size, weight and looks of the Rattray better. Mine has Celtic inspired design elements and a stylized Celtic dog head that looks like my boxer. Lol.
In the end, buy them both