Which organic soil you prefer between ..

I already had a wonderful experience with the full line of BioCanna with the BioCanna Terra PLUS of course.
At my local Costco store, here in Canada, they recently sell a new Special pack Bag of Miracle-Gro (4 x 28L compressed) of Organic All purpose potting mix (eco-cert certification).
When I look at the soil composition on the back, they say it contains 25 % of organics matter.
When I look at the BioCanna, they say they contain 85% of organics matter.

The new miracle grow organic costco mix is way way cheaper (112L for 17.99 at costco and the BioCanna terra plus is 23$ for 50L at my local store).

The biocanna is OMRi listed, and the Miracle Gro is Eco-cert certified.

Im kinda lost when I look at all this, first the 25 % organics matters in the Miracle-Gro is kinda weird to see with a OMRI certification, .. dont you think ?
The opted for the Eco-cert certification instead, why? (quebec, canada)
What are your tought ?

I was thinking trying the Terra plus alone, the miracle-gro organic alone, and some with both mixed ... and all of the 3 mix will still use the Bio canna Line
Let me know

I've grown autos from start to finish on the organic potting mix.Green bags.Some bags say garden mix also.Both good.Dressed with alfameal and other organic stuff