Are the New Models Weak?

It was finally time to retire my original Sonicare. I think its an A-Series (I cut it open and replaced the batteries). I got an Essence+ and Adaptive Clean brush heads. It was very underwhelming, the old Sonicare feels like a jack-hammer compared to the new one.

Its fully charged and the easy start is turned off. I tried the brush head supplied with the Essence+ and it feels a little stronger but still not as good as the old.

I tried placing the old and new in a bowl of water and turning them on. There is absolutely no comparison.

Did I happen to get a dud or are they really just weaker?

Thanks!

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