I'd have to agree with this.
Also, prices on parts for the HR are generally more expensive than a DE - for example Clutch and Flywheel, slave cylinder etc. Plus, if the slave cylinder in a HR fails it's a much bigger job than a DE due to it's location (gearbox out job, right?)
But I have driven del0r's HR 350z on here with Motordyne ART test pipes and it's absolutely savage having that extra rpm