I assume you are referring to the tread. High grip will have a more aggressive tread design used in off-road conditions or in deep snow. They are called off-road tires or snow tires. The difference is in the tread design.
While it is good to use tires with the same tread and sizes, it is possible to use tires with different tread patterns, though you should be careful as the performance of the two tires may be different, causing your car to be unbalanced, endangering your passengers.
Tires usually come with a very sticky tire tread, an all weather tread type, or a winter performance tread type.
Just because
It's road noise caused by deep tread depth. This is more common with off road type tires with agrressive tread design.
tread
Yes.
Don't tread on me! To tread upon the ground. Many people tread on he sidewalk each day.
Different treads yes all that needs to stay the same is the actual tire size such as 235/75/16*Although you will have better handling and the smoothest, safest driving if all four tyres are the same tread.
As a verb, tread means the way someone is walking. As a noun, tread can mean the top of a stair (where you step on), or the tread of a tire.
When the tread (the pattern in the tyre) is wearing thin. In Britain the law says the tread must have a depth of at least 2mm. Other countries may have different legislation.
Yes, as long as the tread widths and tire specifications are all equal.