Ok. Fact check time.
LS3 crate engine 19301326: 430 hp - $6361
LS3 crate engine 19301358: 480 hp (GM Hot Cam) - $6787 (or $8078 with computer and harness)
LS3 crate with engine, tranny, wiring and computer CPSL34L65E: 430 hp - $11,137
LS3 crate engine on ebay: $6650 obo
6.4 hemi crate engine ebay: $7500 obo - 470 hp, 470 ft lb
6.1 hemi used ebay: $5950 ($4000 is more in line with market) - 425 hp, 425 ft lb
LS3 = 6.1 hemi (performance)
They're almost identical in performance with and without a cam swap. Both have hypereutectic pistons. Both have powdered metal rods.
An LS3 powered mopar will NOT 'destroy' a hemi in performance. If anything, it would be a good match-up.