The following table compares the features available(1) in EF Core and EF6.x.

It is intended to give a high level comparison and does not list every feature, or attempt to give details on possible differences between how the same feature works.

Creating a Model	EF6.x	EF Core 1.0.0
Basic modelling (classes, properties, etc.)	Yes	Yes
Conventions	Yes	Yes
Custom conventions	Yes	Partial
Data annotations	Yes	Yes
Fluent API	Yes	Yes
Inheritance: Table per hierarchy (TPH)	Yes	Yes
Inheritance: Table per type (TPT)	Yes
Inheritance: Table per concrete class (TPC)	Yes
Shadow state properties		Yes
Alternate keys		Yes
Many-to-many: With join entity	Yes	Yes
Many-to-many: Without join entity	Yes
Key generation: Database	Yes	Yes
Key generation: Client		Yes
Complex/value types	Yes
Spatial data	Yes
Graphical visualization of model	Yes
Graphical drag/drop editor	Yes
Model format: Code	Yes	Yes
Model format: EDMX (XML)	Yes
Reverse engineer model from database: Command line		Yes
Reverse engineer model from database: VS wizard	Yes
Incremental update model from database	Yes

Querying Data	EF6.x	EF Core 1.0.0
LINQ: Simple queries	Stable	Stable
LINQ: Moderate queries	Stable	Stabilizing
LINQ: Complex queries	Stable	In-Progress
LINQ: Queries using navigation properties	Stable	In-Progress
“Pretty” SQL generation	Poor	Yes
Mixed client/server evaluation		Yes
Loading related data: Eager	Yes	Yes
Loading related data: Lazy	Yes
Loading related data: Explicit	Yes
Raw SQL queries: Model types	Yes	Yes
Raw SQL queries: Un-mapped types	Yes
Raw SQL queries: Composing with LINQ		Yes

Saving Data	EF6.x	EF Core 1.0.0
SaveChanges	Yes	Yes
Change tracking: Snapshot	Yes	Yes
Change tracking: Notification	Yes	Yes
Accessing tracked state	Yes	Partial
Optimistic concurrency	Yes	Yes
Transactions	Yes	Yes
Batching of statements		Yes
Stored procedure	Yes
Detached graph support (N-Tier): Low level APIs	Poor	Yes
Detached graph support (N-Tier): End-to-end		Poor

Other Features	EF6.x	EF Core 1.0.0
Migrations	Yes	Yes
Database creation/deletion APIs	Yes	Yes
Seed data	Yes
Connection resiliency	Yes
Lifecycle hooks (events, command interception, ...)	Yes

Database Providers	EF6.x	EF Core 1.0.0
SQL Server	Yes	Yes
MySQL	Yes	Paid only, unpaid coming soon (2)
PostgreSQL	Yes	Yes
Oracle	Yes	Paid only, unpaid coming soon (2)
SQLite	Yes	Yes
SQL Compact	Yes	Yes
DB2	Yes	Yes
InMemory (for testing)		Yes
Azure Table Storage		Prototype
Redis		Prototype

Application Models	EF6.x	EF Core 1.0.0
WinForms	Yes	Yes
WPF	Yes	Yes
Console	Yes	Yes
ASP.NET	Yes	Yes
ASP.NET Core		Yes
Xamarin		Coming soon (3)
UWP		Yes

Footnotes:

(1) : As of 2016/10/18

(2) : Paid providers are available, unpaid providers are being worked on. The teams working on the unpaid providers have not shared public details of timeline etc.

(3) : EF Core is built to work on Xamarin when support for .NET Standard is enabled in Xamarin.