I’m ranking high on first page of Google now for both sites and soon as user clicks it takes so long to load sometimes.this is quite clearly an issue.
Is this the sole issue now? Let us know.
Aside from what David mentioned, consider this:
The first link suffers more from this than the second link.
It’s sheer size is pretty huge. It’s roughly around 12mb. (thats a lot!)
Considering the context of the topic, It doesn’t seem like only a backend issue as it looks like the site needs optimization especially the images.
Minifying your scripts and stylesheets should help too.