Better is debatable.
Twin screw chargers are internal compression and therefore have better thermal efficiency.
Roots chargers (Eaton) are external compression but (believe it or not) less sensitive about rotor to rotor alignment and timing. Roots are more tolerant of high rpms.
I'm also curious as to what type of hood he'* going to use to cover that monster. It doesn't llok short enough to fit under a standard hood. I'm thing something along the lines of a monster cowl or something.
Soposedly it should fit but if it dosen't then theres always cradle spacers and cutting the hood support beams.