[Rooster]

Here's right out of the Tundra brochure.

SR5 adds the following:
*6 disc in dash CD changer
*Transmission temp gauge
*Overhead console
*Color keyed upper and chrome lower fr. bumper with chrome grill surround
*Variable intermittent windshield wipers
*Heated power outside mirrors
*Fr/rear mudguards
*Cold weather package (heavy duty battery/starter and windshield wiper de-icer grid)
*Tow package
*Different wheels

This is the standard stuff, plus the dealer may have added some options that aren't available on the grade model. Examples of these could be:
*TRD offroad package
*JBL audio system
*Auto dimming rearview mirror w/homelink
*POWER bucket seats (you can get manual buckets in Grade)
*Power moonroof
*Deck rail system
*Running boards

Hope this answers your question.