The Bambino Plus wins for most people: it makes espresso just as good for far less money, and a separate grinder you choose yourself beats a built-in one you can't upgrade.
OUR PICKBreville Bambino Plus
Sage Barista Express
Price
▲£349
£549
Heat-up time
▲~3 seconds
~30 seconds
Built-in grinder
No
▲Yes (conical burr)
Width
▲19cm
31cm
Water tank
1.9L
▲2L
Milk texturing
Automatic
Manual wand
Portafilter
≈54mm
≈54mm
▲ Winner≈ Tie
Bottom line
Buy the Bambino Plus if you want the best espresso per pound and are happy owning a separate grinder — the combination beats the Barista Express on cup quality for similar total spend. Buy the Barista Express only if worktop space or a single-purchase setup matters more than upgradeability.