Which shape of brushing surface better?

[Toothed]

The toothbrush I want to buy comes in two variants. (It's toothbrush with ultra thin hairs from Aliexpress) One has flat shape of hair's edge, the other's are toothed.

 

[honestdoc]

There are no peer-reviewed studies that proved one design is better than the other. If they are inexpensive, buy both and see which feels better to you.

 

[Toothed]

Alright, thank you.

 

[honestdoc]

Here is a good link to toothbrushes...https://www.drchetan.com/tips-to-choose-a-toothbrush.html

 

[Toothed]

Thanks.

 

[Unwind]

The toothbrush I want to buy comes in two variants. (It's toothbrush with ultra thin hairs from Aliexpress) One has flat shape of hair's edge, the other's are toothed.
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It's personal preference. Go with what you like best. I like the gentlest brush I can find, and then I'd probably pick the grooved. And remember, flossing is the most important thing, then brushing. So don't forget to floss.