Is the FANTOM 6 EX worth it over the standard FANTOM 6?

The EX adds the updated engine and sound content to the same 61-key FANTOM body. If you want the current Roland sound set and touchscreen workflow, the EX is the version to get; older FANTOM 6 units remain capable but lack the EX updates.

Does it have built-in speakers?

No. The FANTOM 6 EX has no speakers, so you need headphones, an amp or a PA to hear it.

How many keys does it have?

It is a 61-key keyboard. That is enough for synth and organ parts, but pianists who play wide two-handed passages may prefer the 76- or 88-key FANTOM models.

Can it record audio and samples?

Yes. It includes sampling and audio recording, so you can capture sounds and build songs inside the instrument without a computer.

What connections does it have?

It offers 1/4-inch jacks, MIDI, and USB-B for audio and MIDI to a computer, plus a wall-socket power supply.

How does it compare with the Yamaha MODX or Korg Nautilus?

All three are do-everything workstations. The FANTOM 6 EX stands out for its large touchscreen and Roland's synth and piano engines; the MODX and Nautilus offer their own sound characters and workflows, so the choice comes down to which interface and sounds you prefer.