Both keyboards have 61 keys, however on the Startone we find that they have sensitivity, i.e. if we play with more or less force, the note volume will increase or decrease proportionally. a b c d e f "Casio keyboard advertisement (1985)". Santa Cruz Sentinel. 1985-09-08. p.172 . Retrieved 2019-11-27.

Sustain and vibrato (with options, including vibrato delay). 2 additional sound effects (one is a laser). Had barcode reader accessory to program the on-board sequencer.

In the preset songs we find that the CTK 1500 has 50, and the Yamaha PSR F51 has 30, in the accompaniment preset rhythms the Casio has 70 and the Yamaha includes 114. Preset types of rhythms. (Accompanying rhythms that adapt to what you are playing. There are bossa nova rhythms, etc. Sometimes they are also known as accompaniment styles) (to play over) We will put the characteristics of each of these pianos in 2 different columns to make it easier to see the differences: It's a micro calculator. It has capacity to record, play demo music, vibrato switch, and tempo function. Demo -melody is same VL-1 and it hasn't rhythms. In the Casio we have 32 polyphonic notes and in the Startone 64. Remembering that polyphony, is the amount of notes that can sound at the same time.

Includes bass section of 15 button keys. A minor update to the MT-40 including slower decay on the bass, a thinner sound, etc. Analogue programming. Other relevant differences are that the CTK 1500 does not include a metronome, while the CTK 2500 does. Finally, the CTK 1500 does not have a sustain pedal input, whereas the CTK 2500 does. Rodell, Miriam (May 1985). "The Great Pretender? (ES May 1985)". Electronic Soundmaker & Computer Music (May 1985): 15–15.It has no MIDI-USB connection, which would allow a connection to the computer to be used as a MIDI controller in some music production program. Vibrato, delayed vibrato, heavy vibrato, sustain. Interesting arpeggiator. 10 presets, 10 user programmable patches. Casiotone M-10 advertisement (1981)". The Galveston Daily News. 1981-12-20. p.53 . Retrieved 2019-11-27. Both keyboards have 61 keys, however the CTK 3500 has touch sensitivity, that is, if you press a key hard, it will sound higher, while if you play a note gently it will sound lower.

Both include pre-recorded songs in demo form, the CTK 1500 has 50, while the CTK 3500 gives 60. Speaking of preset rhythms, the CTK 1500 offers 70, and the CTK 3500 includes 100. If you want to know more about this model, don’t miss our review of the Casio CTK-3500 Casio CTK-1500 vs Yamaha PSR F51In the 1500 we find 50 preset songs, and in the 2500 we have 60. Also speaking of rhythm presets, the 1500 offers 70, while the 2500 gives us 100. Has analog filter with cutoff, envelope and resonance controls. Input for BFC-1 Breath Filter Controller which allows control the filters with breath. Sustain and vibrato. Mandolin and Music Box sounds repeat at a fixed interval. Four tones of choice can be stored for press-button access. Casio CTK-1500 comes with100 built-in songs,120 tones,32 Polyphony Tonesand120 rhythms. To ensure easy handling,visibilityand user-friendliness, itfeaturesLC-displayandLesson Part Select for Right hand, Left hand and both the hands.It has been introduced with±1 octaveKey Transposeand415.5 to 465.9 Hz tuning controlswhich make it an ideal starter instrument for all the beginners and intermediates as well. Finally, the Startone, which includes the power adapter, has a MIDI USB connection, which can be connected to a computer to use it as a MIDI controller. Where the Casio makes these features more expensive.