I'm no hardware expert T-Rod, but...

1) To you and me, there would be no noticeable performance difference between those two CPU speeds. Experts could run bench tests on each and tell you the 2GHz model would be 8.5673% faster. So it's up to you if you want to 'waste' $200.

2) Once again, I wouldn't know the difference between these two exact models. Instead, I would look at which card is the more reliable, than which is the fastest.

Overall, you could save yourself $357 dollars getting a slightly lower spec model. I'd go with getting as much RAM in it as I could.

With that money saved instead, you could use it to get the laptop with a built-in fleshlight, to work alongside with what the laptop is best used for....... watching porn.