The rules for ratifying EU trade treaties depend on what's in them. There are two categories known as "EU-only" and respectively "mixed" treaties, roughly discriminated along the lines in the following table:
As examples, the EU-Canada (CETA) agreement is a "mixed" one, whereas the EU-Japan treaty is "EU-only". "Mixed" EU trade treaties require ratification by national parliaments of EU member countries (as well as both regional parliaments of Belgium), whereas the "EU-only" ones do not.
By all accounts, the EU-UK treaty will not require ratification by the national parliaments of EU member countries.
On the other hand, Reuters says e.g.
British Prime Minister Boris Johnson on Thursday had described the last-minute agreement as a “jumbo” free trade deal along the lines of that between the EU and Canada, and urged Britain to move on from the divisions caused by the 2016 Brexit referendum.
The BBC report added that at first look, the full post-Brexit text went beyond a so-called “Canada-style” deal.
So, in what sense does the EU-UK trade treaty go beyond a Canada-style deal, while not becoming a mixed treaty (that requires ratification by national parliaments under EU law)?