RAM is much faster than ReadyBoost.
Say, if someone asks you what 3+4+5 is,
You do 3+4 in your head, "remember 7 and forget about 3+4" and then do 7+5 in your head, that's similar to how RAM works.
ReadyBoost: You do 3+4 in your head, "write down 7 on a piece of paper, look at it, oh it's a seven" so do 7+5 in your head.
Some funky analogy inside
If you really want to imitate multitasking causing lack of RAM, go cycle at the gym while on the phone explaining this cheaper car insurance to your friend, and do a 20! (factorial) in your head. If you have good memory but still can't remember enough, you can write numbers down on your shirts, if you have bad memory, you could carry a memo slip to jot things down, and if that's still not enough write down on your shirts.
(Cycling, on the phone, 20! = tasks, RAM = your memory, memo slip = USB pen, shirts = HDD)
Corsair is the best gaming RAM IMO, but Kingston (Toshiba) is (or used to be) the best laptop memory maker.
I use Corsair memory on my desktop and Toshiba memory on my laptop, if that helps at all.