PS (post script) is file format that can be both vector image and document file. It can contain vector images and text at the same time. PS file holds an instruction about how to print. As it supports both text and images so it can instruct printers how to print the file. PS files are later improved as PDF format.
SVG is a vector graphic image file extension that contains scalable images. This XML based file extension supports animation that can contains vector graphics, raster graphics, and text. It uses lossless data compression algorithm to contain data. It can be edited drawing software as well as text editors also.