- Which one makes better espresso?
- Neither, meaningfully, once you know what you are doing. Given the same beans, the same grinder and a competent operator, the shots are close enough that the difference is smaller than the difference between two bags of coffee. Anyone claiming a clear winner here is comparing their own technique on two machines rather than the machines.
- Which is faster to make a coffee on?
- The Bambino, decisively. It is ready in about three seconds from cold, so it fits a weekday morning. The Gaggia needs several minutes to heat up properly and rewards leaving it on for longer than that. If your coffee happens in a hurry before work, this single difference matters more than everything else on this page.
- Which one steams milk better?
- The Bambino for a beginner, the Gaggia for someone with practice. The Bambino automates it to a genuinely good result with no skill at all. The Gaggia has a manual wand that is slower and less forgiving, but gives you full control over texture once you can use it, and it never does something you did not ask for.
- Which will last longer?
- The Gaggia, and not by a small margin. It is a metal-bodied machine with a commercial 58mm portafilter and a repair community large enough that essentially nothing on it is unfixable. The Bambino is well-built but is not designed to be opened. If you want one machine for a decade, that is the argument.
- Which should I buy?
- Buy the Bambino if espresso is something you want to drink, and the Gaggia if espresso is something you want to do. That sounds glib but it is the actual decision. Both make good coffee, and the difference is entirely in how much of your attention the machine asks for.