It's exciting that there is a price difference of over CHF 100 between the two double packs, but even according to your findings there are no differences! Are you sure?

The link you provided leads to the same product, the "Series 7100 Twin Pack (Sonic Toothbrush)" from Philips Sonicare with the product ID "HX7429/02". There is therefore no difference between the two products as they are the same model.

Here are some of the key features of this product to make sure you have the right information:

- Number of Cleaning Modes: 4 (Clean, White, Sensitive, Gum Health).
- Brushing intensities: 3 (low, medium, high).
- Pressure sensor: Handle vibration and light ring.
- Bluetooth connectivity: Collects brushing data, but no real-time tracking.
- Battery life: Up to 21 days.
- Movements per minute: 62,000.

There are no differences as it is the same product.