I have both the Standard and the Shabaria--both are deep carry knives. The Standard hardly feels like it's there in your pocket because of its small size. The Shabaria's box-shaped pivot area that protrudes--however slightly--above your pocket lip does not, imo, giveaway that a knife is clipped there. The deepest carry Spyderco? Too close to call.
Take your pick. The Standard is a smaller knife but is unobtrusive and friendly to lefties, as well as, righties. (Discontinued long ago and might be hard to find). The Shabaria is a larger knife that affords stealth carry but is not friendly to lefties. (Discontinued recently and might be easier to find).