question: The Roland MC-303 is the first of a series of musical instruments known as a Groovebox, the MC-303 has more in common with other MC prefixed synthesizers, which contain built-in sequencers, than it does with which famous bass synthesizer with built-in sequencer manufactured by the Roland Corporation?
answer: Roland TB-303
context: Title: Roland MC-909
  Passage: The Roland MC-909 Sampling Groovebox combines the features of a synthesizer, sequencer, and sampler, with extensive hands-on control of both the sound engine and the sequencing flow.  It was intended primarily for live performance of pre-programmed patterns consisting of up to 16 tracks of MIDI data.  It was released by Roland Corporation on October 8, 2002.  This product was announced at the AES Fall Convention in 2002.  It is the direct successor to the Roland MC-505, and is the predecessor to the Roland MC-808 which eventually ended the fortunate "Groovebox" line of products by Roland which began in the mid 1990s with the original MC-303.
  Title: Roland MC-303
  Passage: The Roland MC-303 is the first of a series of musical instruments known as a Groovebox.  It combines a simple sound module with a sequencer to record and store notation, along with controls aimed at encouraging the musician to improvise the music while it is playing.  Despite the number in its name and the hype it received at its launch, the MC-303 has more in common with other MC prefixed synthesizers (such as the Roland MC-202), which contain built-in sequencers, than it does with the famous Roland TB-303.  As the first Groovebox, the MC-303 was the first in a line of inexpensive products specifically targeted towards house DJs and amateur home musicians rather than professional producers.  It was superseded by the Roland MC-505.  It is the predecessor to the Roland D2, Roland MC-307, Roland MC-909 and the Roland MC-808.
  Title: Roland TB-303
  Passage: The Roland TB-303 Bass Line is a bass synthesizer with built-in sequencer manufactured by the Roland Corporation.  The TB-303 is a monophonic synthesizer, which means that it can only play one note at a time; it is monotimbral; it uses a sawtooth and square wave oscillator; and it has an 18dB low pass resonant filter.  The TB-303 is used by DJs and record producers to perform and program basslines. Released from 1981 to 1984, it had a defining role in the development of contemporary electronic dance music.  The TB-303 played an important role in the development of house music, influencing Chicago house.  The "squelchy" sound of the TB-303 was a key part of acid house's sound.  The TB-303 is also commonly used in related dance genres such as acid techno and acid trance.  In the 2010s, some DJs and record producers continue to use TB-303 units for their authentic tone and sound; as well, TB-303 basslines from vintage tracks have been sampled for use in 2010s-era songs.  As with any synthesizer, the TB-303 can be processed with effects units to produce different sounds.
citations: Roland MC-303 Roland TB-303