Also keep in mind that the new drive may have higher-density platters that could counteract those performance losses for sequential performance, particularly if that 1TB drive is an earlier model with multiple 500GB (or lower) platters. With a higher density, the drive can potentially transfer more data for each revolution, even if the spindle size is slower. Lower RPM drives do tend to have worse random access performance though, so accessing a large number of tiny files at once could still be slower.
And SMR drives, which are designed to pack more data into the same space at the expense of performance, can perform significantly slower at writing many gigabytes of data to the drive within a short period compared to standard CMR drives, which may be something else to consider. Manufacturers may not even advertise what technology a particular drive is using. Usually though, those drive with much larger caches (like 256MB) will be the ones utilizing the slower SMR tech, as they need the extra cache when organizing the data prior to writing it to the drive.