2 types of web 2.0 blogs. Which has the most SEO preference?

VMart

1. blogname.wordpress.com eg: https://google.wordpress.com/

2. blog.rediff.com/permalink eg:http://blogs.rediff.com/dennishorn3/2016/12/22/10-url-building-risks-to-prevent-for-seo/

1. It's an individual web 2.0 hosting 
2. It's a blogs sub-page
In this both web 2.0 I have created a new post, while I see metric both 1st is showing '0' 2nd is taking this blog metric.

In this both which has the most SEO preference 

servercookie

Simple , use ahrefs to analyze witch of those domains are stronger. Then go with the on tjst is stronges. Or even better, just post to both

redrays

The people I know who use web 2s on tier 1 typically prefer the ones that create a fresh subdomain, or what you call "an individual web 2.0 hosting". I think this is mostly because Google seems to treat each subdomain as a separate linking domain (or close to it).

VMart

@redrays

What my confusion is.
In wordpress blog while I create new blog and check alexa metric was '0
eg: https://google.wordpress.com/ (blogname.wordpress.com)

Like the same way if I create blog in rediff the alexa metric is higher
eg: http://blogs.rediff.com/dennishorn3/2016/12/22/10-url-building-risks-to-prevent-for-seo/

What is the different between the both?

BLOG 1

BLOG 2

redrays

@VMart - the theory is that authority / Pagerank / link juice / whatever flows into subfolders and not into subdomains. Third party metrics appear to be built based on this theory.

So in your example, blogs.rediff.com has links from 44k domains, and your subfolder is benefitting from that massive amount of links. Even though wordpress.com has tons of links as well, your subdomain is not getting the same kind of benefit.

All of that said, for your purposes I wouldn't worry about this too much. If you're going to rely heavily on Web 2.0 links just build whatever you can.

VMart

thank u @redrays