Hi Wojciech Trawiński

Thanks a lot for the reply.

1. Yes, its possible to change the color via CSS on icon fonts. But icon fonts can always have only one color. So it's not possible to have an icon that has red and blue in it.
2. When you position icon fonts you have to deal a lot with line-height, vertical-align or letter-spacing. With SVG it’s simpler because its only the size.