Mobile version or adaptive layout for an online store?

Question

css

I am making an online store, I have drawn layouts for PC and a mobile version (2 layouts for 320 and 600 pixels)
The question arose whether it is better to choose a mobile version of the site (on a separate m.sate.ru subdomain) or make adaptive for all sizes.
For the mobile version:
1. Reducing the load on the client side (mainly on the Internet). Whatever you have to download long html and css from mobile traffic, you can put lighter images.
For the adaptive version:
2. We do not lose SEO traffic to the mobile version (about 20%). But it seems to me that you can fix it by pointing the mobile site as the main mirror.
In general, I want to hear more opinions for and against. Maybe I don't know something.

Answer 1

The world is logically moving along the path of simplification, and this is good.
I recommend doing a simple non-loaded design and an adaptive mobilefirst version of this design.
- the rubber version is better, which looks great on both a smartphone and a tablet.

Answer 2

You can make a mobile version on the same domain (without any m.site.com) - generate different versions on the server and give the right one by user-agent

Answer 3

Mobile adaptive.
The main one for desktops exists in parallel.

Answer 4

I'm against. I immediately switch from the mobile version to the full one, because behind some crap in the mobile version, the designer hid all the important information for which I even went to the site! It’s easier for me to zoom in on the screen of a smartphone a couple of times than to mess around with the mobile version.