Nope. Unless they're not operating to Airbus SOPs they'll be landing with Flap Full (and gear down, natch!) It could be that flaps and gear were selected at different times (ie speeds) on the two approaches, or that what you heard wasn't the gear; the speed brakes are pretty noisy and cause a very noticeable rumble. Lastly, where you are sitting, relative to the wing, will make an enormous difference.
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