8x FSAA vs 8x MSAA

Hi Guys,

I have an issue where there is noticeable 'stair-casing' when using 8x MSAA.



(Image is zoomed 200% to highlight what is happening).

I am using MSAA on a render target (as global FSAA doesn't seem to have any effect on render targets).

I have double checked the render target and its dimensions are identical to the back buffer.

Is the difference between FSAA and MSAA normally this noticeable?

Thanks in advance