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Short version: the Breville Barista Express (BES870) is a self-contained kit with a built-in grinder, and the Gaggia Classic Pro is a bare 58mm machine you pair with a separate grinder. If you want to pull a shot on day one out of one box, buy the Breville. If you want a commercial 58mm portafilter, a brass boiler, and a platform people mod for years, buy the Gaggia and budget for a grinder. The Breville uses a 54mm portafilter with an integrated conical burr grinder and 16 grind settings (Breville); the Gaggia Classic Pro E24 uses a 58mm portafilter and a lead-free brass boiler with no grinder (Gaggia).
The real difference is where the grinder lives
These two get compared because they land at a similar entry price, but they are different philosophies. The Barista Express is an all-in-one. Beans go in an 8 oz hopper on top, the built-in conical burr grinder doses straight into the 54mm portafilter, and a Thermocoil heating system with PID temperature control runs the water at 200F for a 9 bar extraction with low pressure pre-infusion (Breville). One appliance does grinding, dosing, brewing, and steaming.
The Gaggia Classic Pro does not grind at all. No grinder is included (Gaggia). What you get instead is a commercial 58mm stainless steel portafilter and group, a lead-free brass boiler, a 3-way solenoid valve, and a commercial-style steam wand, all in a one-piece steel frame made in Italy and weighing about 19 lbs (Gaggia). The 58mm basket is the same diameter used on most prosumer and cafe machines, so your puck prep skills and accessories carry over if you upgrade later. The catch is that a Classic Pro is only as good as the grinder feeding it, and a decent espresso grinder is a real second purchase.
So the honest framing is not "which machine is better." It is "do you want one box that does everything at a solid level, or a serious brew head that you complete with your own grinder."
Spec comparison
| Spec | Breville Barista Express (BES870) | Gaggia Classic Pro (E24) |
|---|---|---|
| Portafilter | 54mm stainless steel | 58mm stainless steel |
| Built-in grinder | Yes, conical burr, 16 settings | No grinder included |
| Boiler / heating | Thermocoil with PID, 200F | Lead-free brass boiler |
| Power | 1600W | 1425W |
| Water tank | 67 oz | 72 oz |
| Bean hopper | 8 oz | None |
| Steam wand | Manual steam wand | Commercial-style, 2-hole |
| Weight | ~32 lbs (shipping) | 19 lbs |
Sources: Breville BES870 product page and Seattle Coffee Gear for the Breville tank, wattage, and hopper; Gaggia North America for the Classic Pro numbers.
Which one to buy
Buy the Barista Express if you are starting from zero and do not already own a grinder. The math is the case for it. A capable standalone espresso grinder can cost as much as the Gaggia body itself, so the all-in-one usually wins on total cost for a first setup, and the 16-setting built-in grinder plus dose-into-portafilter workflow gets you drinking espresso the same day. The 54mm basket holds slightly less coffee than a 58mm, and it is a bit of a Breville-specific world for accessories, but for a home espresso and milk-drink habit it is a lot of machine in one footprint.
Buy the Gaggia Classic Pro if you already have a good grinder, or you are happy to buy one, and you care about the 58mm standard and long-term modding. The brass boiler and commercial group hold heat well, the machine is famously repairable, and the 58mm portafilter means baskets, tampers, and bottomless portafilters from the wider espresso world all fit. It steams and brews at a genuinely high level once dialed in. The tradeoff is a steeper learning curve and the extra grinder spend that the Breville includes in one box.
For most people asking this question because they want their first real espresso machine and have not bought a grinder yet, the Breville is the pragmatic pick. For anyone who already grinds fresh or who sees espresso as a hobby to grow into, the Gaggia is the platform with more headroom.
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FAQ
Does the Gaggia Classic Pro come with a grinder? No. Gaggia lists no grinder with the Classic Pro E24, so you need a separate espresso grinder, whereas the Breville Barista Express has a conical burr grinder built in.
Is 58mm better than 54mm? The Gaggia's 58mm portafilter is the common commercial standard, so accessories and baskets are easier to source and it holds a slightly larger dose. The Breville's 54mm works fine but keeps you in the Breville accessory ecosystem.
Which is cheaper overall? The Breville usually costs less once you count a grinder, because the Gaggia needs a separate espresso grinder that can add roughly the price of the machine itself. If you already own a good grinder, the Gaggia body is the lower spend.