Benchmarks say they're pretty similar. I play tf2 on low at 768p and i get 30-40fps, but that does the job for me.
Oh. So you just lowered the resolution and rolled with it. Well my laptop is already at that as the top setting on resolution for my screen. I guess I was used to my kids computers. Even my youngest son's pc kicks this laptop's butt all over the place.
I bought this laptop for use in making decal designs with my sister in law while visiting Texas. I never thought I would be gaming with it. In retrospect I would have picked a little more power and maybe a discrete mobile gpu. Maybe not. Desktops are the way to go.
Your desktop build will be a radical shift up in speed and power.