Izzo Alex Duetto IV Plus vs La Spaziale S1 Mini Vivaldi II
Technical comparison · Dual boiler
The comparison between Izzo Alex Duetto IV Plus and La Spaziale S1 Mini Vivaldi II analyzes two semi-professional dual boiler espresso machines. The Izzo Alex Duetto IV Plus falls into an estimated price range of 2200–5000€, while La Spaziale S1 Mini Vivaldi II falls into an estimated price range of 1000–2200€. The analysis targets advanced users evaluating the trade-off between the technical flexibility of a rotary pump and the ergonomics of a large-capacity tank system.
| Parameter |
Alex Duetto IV Plus
Izzo
F4 · Semi-professional
|
S1 Mini Vivaldi II
La Spaziale
F4 · Semi-professional
|
|---|---|---|
| Identity | ||
| Use tier | F4 — Semi-professional | F4 — Semi-professional |
| Price | ||
| Price (€) | ~2200–5000 € | ~1000–2200 € |
| Price updated on | 09/2026 | 09/2026 |
| Universal specs | ||
| Dimensions (W×D×H) (cm) | 36.4 × 45 × 41.6 cm | 41.5 × 41.5 × 38.5 cm |
| Weight (kg) | 33 kg | 28 kg |
| Power (W) | 2450 W | — |
| Voltage (V) | 220 V | — |
| Category specs | ||
| Boiler architecture | Dual boiler | Dual boiler |
| Portafilter diameter (mm) | — | 53 mm mm |
| PID control | Yes | — |
| Pump type | Rotary | Vibration |
| 3-way solenoid valve | — | Yes |
| Group head type | E61 | — |
| Water tank capacity (l) | 2.3 l | 3 l |
| Steam wand | — | Manual steam wand |
| Plumbable | Yes | — |
| Pressure gauge | Yes | Yes |
The differences that matter
Pump: Izzo Alex Duetto IV Plus uses a rotary pump, whereas La Spaziale S1 Mini Vivaldi II employs a vibratory pump. Water supply: Izzo offers direct plumb-in capability, while La Spaziale operates with a larger integrated tank (3 liters versus Izzo's 2.3 liters). Brew group: Izzo is equipped with a classic E61 group; the group type for La Spaziale is not specified in the technical data, but it adopts a 53 mm portafilter (the size of which is unavailable for Izzo). Dimensions and weight: La Spaziale is wider (41.5 cm) but less deep (41.5 cm) and shorter (38.5 cm) than Izzo (36.4 x 45 x 41.6 cm). Izzo weighs 5 kg more (33 kg versus 28 kg). Temperature control: Izzo lists the presence of PID control, a specification not declared in the La Spaziale data. Price: Izzo Alex Duetto IV Plus falls into an estimated price range of 2200–5000€, compared to La Spaziale S1 Mini Vivaldi II which falls into an estimated price range of 1000–2200€.
Which one to choose
Choose Alex Duetto IV Plus if…
Izzo Alex Duetto IV Plus is suitable for those requiring a permanent installation thanks to the plumb-in capability and a rotary pump, which ensures quieter operation. The E61 group and PID control provide targeted thermal management for extraction parameters. Its 33 kg weight and 45 cm depth require a dedicated and structurally reinforced worktop.
Choose S1 Mini Vivaldi II if…
La Spaziale S1 Mini Vivaldi II suits those who prefer a reduced vertical footprint of 38.5 cm and a 3-liter water tank, bypassing the need for a direct water connection. The use of a vibratory pump and a 53 mm diameter portafilter defines the extraction hardware profile. The 28 kg weight makes occasional relocation easier compared to the competitor.
Where to buy
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