Prerunner, Sport, SR5? Differences?

I am the proud owner of an 06 DC Black Sand Pearl "Prerunner". I've done some searches for the differences between "Prerunner" and SR5 but it's still somewhat unclear to me. Can someone explain the package differences between them? I've got the prerunner chrome grill surround and rear bumper, sliding rear window, leather wrapped steering wheel, and no chrome ring around the automatic gear shifter. Anyone?

 

PreRunner = 2WD. SR5 = Package. TRD = Top Package(s). SR5 or TRD can be 2WD or 4WD but PreRunner is always 2WD but can be had with either of the two SR5 or TRD trims. http://www.toyota.com/tacoma/options.html

 

Thanks for responding. I guess I was confused because mine has all the features of the SR5 Extra Value Package, except for the SR5 Fabric Trim & the Backup Camera, & Temp monitor. I was begining to think I had an SR5.

"SR5 Extra Value Package: Power Outside Mirrors (Access Cab models only), Remote Keyless Entry System, Cruise Control, Variable-Speed Wipers, Chrome Grille Surround & Rear Bumper, Color-Keyed Front Bumper & Overfenders, Fog Lamps (V6 models only), Sliding Rear Window with Privacy Glass, Bucket Seats with Driver Lumbar Support, SR5 Fabric Trim, Metallic-Tone Instrument Panel Trim, Leather-Wrapped Steering Wheel with Audio Controls & Leather-Wrapped Shifter (A/T models only), Dual Sunvisors with Mirrors & Extenders, Tailgate-handle integrated backup camera [1] linked with an auto-dimming mirror with monitor [1], SR5 Badge"