I suspect this is the sugar pear they are referring to
These are the seckle
Worden and others i cannot tell the difference in them and seckle at this stage. Please let me know how it goes. Take a look at the worden seckle photo in this thread @PharmerDrewee posted shown below Worden seckel pear
Seckle pears point up at this stage. The sugar pear that i have heard called a variety no longer point up like those in the photos above they begin to drop since they are larger under the weight i presume. You can see a few are beginning to drop over well before seckles reach that size. Many call them large seckle.