A trademark is a way to protect a name/brand in a specific sector.
A company can even trademark a colour in a sector if they want, this often applies to hues of colours that makes up a big part of the brand.
The same applies to logos, and since a brand can be a specific letter like “R”, that can be trademarked as well, however, that won’t prevent other companies from using names that contains or starts with an “R” and trademark them.
As for if the logos look similar, I think T2’s lawyers believe that featuring a large single “R” on the logo of a computer game, is too close to Rockstar’s logo, and since both logos are used in the computer entertainment industry, there is a risk of confusion.
A trademark is a way to protect a name/brand in a specific sector.
A company can even trademark a colour in a sector if they want, this often applies to hues of colours that makes up a big part of the brand.
The same applies to logos, and since a brand can be a specific letter like “R”, that can be trademarked as well, however, that won’t prevent other companies from using names that contains or starts with an “R” and trademark them.
As for if the logos look similar, I think T2’s lawyers believe that featuring a large single “R” on the logo of a computer game, is too close to Rockstar’s logo, and since both logos are used in the computer entertainment industry, there is a risk of confusion.