The electric toothbrush market in Australia is essentially a two-horse race between Oral-B and Philips Sonicare. Both brands offer multiple models at various price points, and both claim superior cleaning. I’ve been alternating between current models from each brand for three months to give you a real-world comparison.

How They Work Differently

Oral-B uses an oscillating-rotating brush head. The small, round head spins and pulsates against each tooth. Philips Sonicare uses a vibrating brush head that looks more like a traditional toothbrush. It sweeps back and forth at high frequency, using vibrations to create fluid dynamics that help clean between teeth.

Both technologies are clinically proven to clean better than manual brushing. The difference in effectiveness between the two is marginal. Dental professionals I’ve spoken with say both are excellent and the best choice is whichever one you’ll actually use consistently.

The Models I Tested

From Oral-B: the iO Series 6 (around $249) and the Pro 3 3000 (around $79). From Philips: the Sonicare DiamondClean 9000 (around $299) and the Sonicare 4100 (around $79).

This gives us a mid-range and a budget option from each brand.

Mid-Range: Oral-B iO Series 6 vs Philips Sonicare DiamondClean 9000

The Oral-B iO Series 6 feels premium. The magnetic charging, the interactive display showing brush mode and timer, and the smooth operation make it feel like a significant upgrade from basic electric toothbrushes. The cleaning modes are useful (daily clean, intense, whitening, sensitive, super sensitive), and the pressure sensor prevents you from brushing too hard.

The Philips Sonicare DiamondClean 9000 is sleek and elegant, with a slim handle that feels comfortable in hand. It comes with a charging glass that doubles as a rinse cup, which is a nice touch. The BrushSync technology tracks brush head wear and alerts you when replacement is needed.

In terms of cleaning feel, the Oral-B iO is more aggressive and tactile. You feel each tooth being scrubbed. The Philips is gentler and smoother, with the sensation of a thorough but less intense clean. People with sensitive gums may prefer the Philips experience.

Both connect to smartphone apps that track brushing habits and coverage. Both apps are functional but not essential. I stopped using both apps after a couple of weeks, as the toothbrushes work perfectly well without them.

Budget: Oral-B Pro 3 vs Philips Sonicare 4100

At around $79 each, these are the entry-level electric toothbrushes worth buying. The Oral-B Pro 3 is a no-frills oscillating toothbrush with a pressure sensor, timer, and decent battery life. The Philips 4100 is a basic sonic toothbrush with a two-minute timer and pressure sensor.

Both clean noticeably better than a manual toothbrush. The Oral-B Pro 3 feels more powerful, while the Philips 4100 is quieter and gentler. At this price, the difference between the two is genuinely minimal. Pick whichever type of motion you prefer.

Replacement Brush Head Costs

This is where the real long-term cost lies. Oral-B replacement heads cost $8-$15 each depending on the type, and you need to replace them every three months. Philips heads are $10-$18 each on the same schedule.

Third-party replacement heads are available on Amazon AU for both brands at significantly lower cost ($3-$5 per head). In my experience, the third-party Oral-B heads are decent, while the third-party Philips heads are less consistent. Buying genuine heads in multi-packs reduces the per-head cost.

Over a year, budget for about $40-$70 in replacement heads. This is a cost that many people overlook when buying an electric toothbrush.

Battery Life

The premium models have shorter battery life than you’d expect due to more powerful motors and displays. The Oral-B iO Series 6 lasts about 8-10 days. The Philips DiamondClean 9000 lasts about 14 days. The budget models last longer, with the Oral-B Pro 3 going about two weeks and the Philips 4100 lasting about two weeks.

All charge via their respective proprietary chargers. Travel cases are included with the premium models.

Which Brand Should You Choose?

If you prefer a more intense, tactile clean and don’t mind a slightly larger brush head, go Oral-B. If you prefer a gentler, quieter experience and have sensitive gums, go Philips Sonicare.

For budget buyers, the Oral-B Pro 3 at $79 is my recommendation for most people. It’s effective, simple, and the replacement heads are affordable. For mid-range buyers, the Oral-B iO Series 6 at $249 offers a genuine premium experience that feels worth the upgrade.

Where to Buy

Chemist Warehouse consistently has the best prices on electric toothbrushes in Australia, followed by Amazon AU. Shaver Shop stocks both brands. Avoid buying at full retail price, as both brands are frequently on sale, and waiting for a deal can save you 30-40%.

The Honest Truth

Both Oral-B and Philips Sonicare make good electric toothbrushes at every price point. The best one is whichever you’ll use twice a day, every day. Don’t overthink it. Pick a budget, pick a brand, and commit to using it properly. Your dentist will notice the improvement regardless of which one you choose.