Zojirushi Rice Cooker: 3‑Cup vs 5.5‑Cup — which to get?

I usually cook 1–2 cups of rice, occasionally up to 3. I’m deciding between the 3-cup and 5.5-cup Zojirushi models. For those who own either:

• Any noticeable difference in rice quality between the small vs large model?
• Is the bigger one worth it for occasional larger batches, or overkill for mostly small amounts?
• Any issues cooking tiny batches in the 5.5-cup?