Actually the LS shares absolutely not one single part, measurement, or design of the old small block Chevy.
Now bear with me... I'm not a Chevy guy looking to stir up crap on a Mopar board. I like all makes. Right now in my garage an LS and a hemi are currently cohabitating and I'm pretty well experienced with both engines. I personally can't think of even a remote hint of an advantage the hemi has.