there are differences between the 2 units regarding arpeggios. Eclipse uses delays whereas Pitch Factor HarPeggiator creates dual 16-step arpeggios that combine three elements:
1) dual 16-step pitch-shift sequencer
2) dual 16-step rhythm sequencer
3) dual 16-step effect sequencer
You may want to check its user manual for more details.
They are very different.
best
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