In the world of dryers, it's a question of buying either the GHD Aura or the Dyson Supersonic. There's no question that Dyson's dryers are smarter. On-board CPUs receive information about temperature constantly, ensuring that hair damage isn't a factor. However, both GHD and Dyson are up to speed where it really counts: ensuring an even, rapid drying experience. Both use ionisation to dry hair quickly. The dryer from Dyson has a unique look that will seduce some people, but GHD's dryers are easier to customise via attachments. This contest will come down to personal taste.
For frequent travellers universal voltage is a real boon. There's nothing worse than being away from home, wanting to look your best, and then discovering your hairdryer is about as useful as someone blow drying your hair through a straw, or that your straighteners just can't get up to the temperature you need to achieve the look you want. Performance from the Platinum+ is going to be the same wherever in the world you are.