...the Sensitone Aluminum snare will give you a drier sound. The 6.5x14 Aluminum is a beast along with the 5x14 size.
...the 6.5x14 will give you a sound similar to what Big Mike Clemons used on "Jesus At The Center" album though Big Mike used a Crush Aluminum that is killer!!!
...the 5x14 is king in the Studio and Live will get you close to Dave Weckl's sound depending on the tuning. To sum things up; both sizes are dope and it all depends on what your music application is. It is a drier snare sound than the Steel Sensitone and not as bright that's for sure.