Ultimately there's always going to be a difference in opinion on subjects like this...not every tuner does things the same do they?! They may well end up with the same bhp but doing things a totally different way, i'd choose someone with proven cars/experience and stick to their advice. I''ve got a mate who ports my heads, no one on here will of heard of him obviously but doesn't mean he doesn't know what he's doing....though from what i've seen of some 'tuners' work he probably has alot more knowledge than them lol.