Buy the Aquasonic Black Series.

It has the reviews, the dental seal, and the price. GRAUICI has neither the track record nor the reason to cost four times as much.

What was compared

Aquasonic Black Series Ultra Whitening Toothbrush – ADA Accepted Electric Toothbrush- 8 Br... — $19.99
GRAUICI Deep Clean Rechargeable Electric Powered Toothbrush, Rechargeable Electric Toothbr... — $74.99

1. 137,000 buyers already settled this
Aquasonic holds a 4.5-star average across 137,946 ratings. GRAUICI sits at 3.9 stars from just 170. That is real-world proof at scale, not a handful of early reviews that could flip either direction next month.
2. The only one dentists actually signed off on
Aquasonic carries the ADA Council on Scientific Affairs seal for reducing plaque and gingivitis. GRAUICI's listing makes no such claim anywhere. One brush has independent dental backing, the other has marketing copy.
3. Same 8 heads and charging dock, way less cash
Both ship with 8 brush heads and wireless-style recharging, but Aquasonic runs $19.99 against GRAUICI's $74.99. You would be paying nearly four times more for a brush with a fraction of the review history behind it.
4. A motor design proven for over a decade
Aquasonic's 40,000 VPM sonic vibration is the same category Sonicare made standard and dentists recommend daily. GRAUICI's rotate-and-vibrate motor at 4500 to 8800 RPM is a newer design with almost no reviews to back its claims.
5. Yes, it senses pressure. It won't matter.
GRAUICI's pressure sensor and 50-day battery beat Aquasonic's 4 weeks on paper. But Aquasonic already has a smart timer to curb overbrushing, and nobody runs a toothbrush a full month, you top it up on the dock anyway. Unless you brush hard enough to need a buzz reminder, go for it, but that is not most people.