Hellcat 6.2 liter engine vs 6.4 liter hemi

The 6.4 has 10.9 to 1 compression, (390 cu in)
the Hellcat has 9.5:1 compression and 11.6 psi supercharging (376 cu in)

a 426 cu in is 6.9 liters and I believe a 440 is 7.2