Supra engine is a twin turbo inline 6. No comparison to a supercharged v6.
The skyline GTR is also a twin turbo'd inline 6 as well.
I've never been a big fan of V6's or V8's, but it's good to see someone doing something different. If it costs less and you end up getting similar performance, I'd rather go that route rahter than paying an arm and a leg for something similar.