Urg, which RAM?!

Hello, i ordered some more RAM to match whats already in my PC:

Crucial Ballistix DDR PC4000.

I then got an email saying that they dont actually make that anymore, and they offered this replacement:

Crucial Ballistix Tracer DDR PC4000

Which looks almost exactly the same, wheres the difference?

If i bought this RAM, would it conflict with my existing RAM?

Any help would be really really great!

Thanks.

The only difference is the Tracers have LED lights on the top and bottom.

They should work just fine together.