SSRS vs Report Builder

SSAS and SSRS
1

If we do not want to use sql server reporting services, Can we use ReportBuilder ??

2

Do you mean,just want to develop the reports?
If yes,the BI studio would be enough for this.

3

my question is that if i dont want to use SSDT- BI and want to use Report Builder for making reports.
Does ReportBuilder have same feature as SSDT- BI

4

And which is best to develop reports report builder or sql server data tool- BI