The Rhythm Mate is Tama’s cheapest entry-level kit. It’s the most affordable current kit that you can get from Tama that has classic Tama design qualities. While the Imperialstar is also an entry-level set, it has a few higher-quality design features. The Rhythm Mate doesn’t come with cymbals as the Imperialstar does. However, you can specifically place an order for cymbals to come with the kit at an extra cost. Overall, the Rhythm Mate is purely for beginners, while the Imperialstar could be used by drummers breaking into the intermediate realm.