An image of the SVG (Scalable Vector Graphics) type can not be used in Drupal. Not even by adding the filetype in an imagefield setting. Illustrator and Coreldraw use SVG formats. It has some advantages (sharp, less memoryspace,...)
SVG Formatter and SVG Image field are simular modules. Both do the same. The dirfference is that one uses a file field and the other has a seperate svg field.
Here the display of the svg image field...
Both give the same display settings of the field
Compare the 2 modules...they are the same in the dispaly mode.