Different domains vs subdomains for 6 e-shops

[TauriUrb]

We have to choose to stay working with different domain or move all 6 domains to new domain.

Right now we have 6 different brand e-shops with 6 domains that have Domain Authority 30-40. So for example:
e-shop1.com
e-shop2.com
..

And we are thinkig about making brand new domain and move all these domains content and link juice into one domain  with 301 redirect. So we would have one e-shop solution with 6 subdomains like:

e-shop1.newdomain.com
e-shop2.newdomain.com
...

Like gap.com does with their brands or http://www.andotherbrands.com. That each brand has subdomains but they use same e-shop solution. With same domains or new subdomains strategy, we will improve internal linking structure between all these e-shops. We have also considerd that with new domain we don't have good organic search results within few first months. So we try to see the bigger picture and consider SEO future.

SO QUESTION IS:
Lets leave brand marketing out, then what would you suggest to do? To stay with 6 different DA 30-40 domains or build one stong domain with 6 different brand subpages? We cant use subcategories. All subpages products will be clothes.

Latetly there as beed many news and articles that subdomains are part of main domain and vice versa we are looking suggestions from this board. As we right now think that as we have weak domains righ now it would be better idea to start building one strong domain.

[TauriUrb]

Unfortunately we can't use subcategories.

[TauriUrb]

So for example articles like these that say that "A part of authority is inherited" between domains and subdomains are completely wrong wrong? http://www.webseoanalytics.com/blog/multiple-domains-vs-subdomains-vs-folders-in-seo/

[ditoroin]

If you want to combine all of these domain into one, you should consider to create one domain (not subdomains), like this:

www.newdomain.com/e-shop1
www.newdomain.com/e-shop2

[yeagerd]

sub domains and domains do not share seo juice.

example.com and example.yourotherdomain.com are equally separated from yourotherdomain.com in the eyes of SEO.

Plus it is my xp that you do not transfer all of the link juice when you 301, about 2/3rds is what we have seen.

So I think all you would do is loose 1/3rd of your SEO and have to do a lot of work to do it.