OT: winrate drop between 400nl and 200nl

[ycjason]

I often hear people say the difference between 200nl and 400nl is the biggest among various levels. Is that really true? I plan to move to 400nl next month after running very hot in 200nl this month and build my roll to around 20k. I am just wondering what kind of winrate drop people typically experience when moving up to 400nl?

I plan to drop back down to 200nl if I lose 15 to 20 buyins at 400nl, sounds like a plan?