well the clevo 1080 is an IPS panel which is much better - though even things like the ASUS ROG laptops use a TN panel instead of an IPS.
it's better in both cooling and material - though the brushed aluminium on the skyfire tries hard - it is just worse - it's kind of hard to describe.
the CPUs won't throttle, it's just whether or not they'll bottleneck the GPU - the absence of turbo boost is also quite a key thing for the I3.
comparing benchmarks you can use this:http
/www.notebookcheck.net/Computer-Games-on-Laptop-Graphic-Cards.13849.0.html
and then just select your GPUs. It depends on the game - titanfall shows an increase of 2fps - metro 2034 shows 7 fps, DOTA II shows 16, bioshock 12 etc.
the difference normally breaks the 30+ FPS boundary at ultra 1080p for games - so that being said I'd say it's worth it.