Q: how good is macbook pro compared to 13" macbook pro retina and is the macbook pro has haswell processor and  will I get further updates if I buy macbook pro without retina

https://www.apple.com/mac/compare/notebooks.html

will I get further updates if I buy macbook pro without retina

I do not know what you mean by that. Any currently produced Mac is likely to be supported for as long as every other Apple product that has ever been produced. Most Apple products are relegated to "vintage" status approximately six years after which they are discontinued by Apple, meaning that the non-Retina MBP is likely to be supported through 2020.