All of this stuff is so subjective, but yes, to me the Pitaka feels slightly slimmer and lighter (it is actually a little lighter). More so than the difference in size though, I notice the difference in texture. The Pitaka is smooth and the surface feels almost soft to the touch. Because of that it’s more comfortable, but less grippy, than the Sheath. It’s really nice for around the house or office, but the Sheath might be preferable for things like hiking or biking where you’re outside taking lots of photos and need better grip. Again, this is all very subjective, so please take it with a good dose of salt.