There are a few key differences between Metro on W8 compared to WP7.5 though.

One example would be buttons. Most of the buttons on W8 are colorful boxes, while on WP7.5 they are plain white texts. I prefer the simplicity of the plain white texts though, especially on smaller screens, makes things much easier to focus.

Windows 8's Metro interface is more suitable for touch input. The desktop interface has been improved slightly, so it's better to use than Windows 7.

I think the whole issue of switching between Metro and Aero has been blown entirely out of proportion. Sure it can be quite distracting when you want to search for apps (because you gotta go back to Metro to use the default Start Search function), but that's about it. In the millions of other ways you could use the OS, it doesn't affect usability at all.

Good luck bro, Lazada is very inconsistent. Some people have it fast, some people wait 2 months also stock never arrive. Always practice COD when shopping in Lazada. I ordered my iPad last week, tomorrow will be the 7th business day already, haven't come.