I have installed SQL Server vNext and ran the Setup Discovery Report and noticed the Version Numbers reported are different that what is reported from Visual Studio 2015 > Help > About Visual Studio (also, R Services are not reported in VS Help even though I have RTVS installed)
Microsoft SQL Server vNext Community Technology Preview 1 (CTP1) Setup Discovery Report
Product: Microsoft SQL Server vNext
Feature:
Database Engine Services Version: 14.0.1.246
Analysis Services Version: 14.0.1.246
Integration Services Version: 14.0.1.246
Reporting Services - Native Version: 14.0.1.246
R Services (In-Database) Version: 14.0.1.246
R Server (Standalone) Version: 14.0.1.246
Analysis Services 14.0.1.291
Integration Services 13.0.1601.5
Reporting Services 14.0.1.291
R Tools for Visual Studio 0.5.21019.1228
SOTATS, Inc.