Hey there, how are you?
I'll be precise, i'm an expert PHP developer, and have worked on various nature of website from eCommerce to corporate websites.
Regarding your project, you require an SEO Audit website, so i have few queries,
what kind of error do you wish to be shown?
( like alt text missing error, js or css minification error etc. )
And you want the website to be compared with their competition, do you want it to be compared with top three? or top two?
lets discuss more via chat,
Talha.