Abbe Fetel is compatible with quince rootstock.

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Atlantic Queen can be a bland and astringent pear when grown in the wrong climate or location.  It will likely require hot summers and full sun exposure.

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The flavor of Gem is mild and crisp off the tree, making it somewhat reminiscent of an Asian pear.  Placing it in cold storage for at least three weeks will give it more flavor and allow it to soften.

Harrow Crisp can be harvested over a period of 2 weeks, but the earlier they are picked, the longer they will store (for a maximum of 2 months).

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Harrow Sweet is graft compatible with quince rootstock.

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Honeysweet has a higher level of self-fertility than most European pears, but the fruit will be smaller without cross-pollination.  It is often described as an improved "Seckel", a parent of Honeysweet, both of which are some of the few European varieties that are quite good right off the tree (most varieties should be harvested shortly after they mature and placed in cold storage for a few weeks, followed by a few days on the counter, if you wish for them to reach anything near their peak).

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Magness has had some issues with fireblight in the harsh climate of the deep south where its sibling 'Warren' performed quite well.

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Moonglow produces poor quality fruit in the south, and they may not be particularly good in the north either.

The Potomac pear is essentially the disease resistant replacement of Anjou.

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Like the other varieties labeled as "highly resistant", Warren can survive fireblight in the deepest parts of the south where its sibling 'Magness' may struggle.  However, Warren can take nearly a decade to start producing on standard rootstock and should be paired with OHxF 87 if your soil isn't too heavy or wet.

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Chojuro is reputed to be the most likely Asian pear variety to develop a butterscotch-like flavor, but it may not be apparent every year, particularly in cooler climates.

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The flavor of Hosui is considered to be quite good in hot summer climates, but it may produce fruit of moderate quality, with a more pronounced tartness, when grown elsewhere.

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Raja is said to be disease resistant, but it does not mention any specifics and there is contradicting evidence when it comes to both fireblight and pseudomonas.  Personally, I have seen it get pseudomonas on the first 1 to 2.5 feet of a young tree that looked quite severe, but it apparently shook it off both times (update: the tree never came out of dormancy the year after).  Pseudomonas killed 'Shinsui' (grafted within this range) on its first attempt (Shinsui grafted ~4 feet high never got it). 

Raja ripens well in cool summer climates.

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Seuri supposedly has a unique flavor.

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Shinko requires a hot climate to fully develop its flavor.  While other Asian pears have this problem as well, Shinko seems to be the most consistent offender.

Asian pears are known for being quite precocious, especially when they are compared to European pears, but Shinseiki may be able to produce as soon as the year after planting.  This isn't necessarily something you should allow, though.  You don't want to divert too much energy away from the tree if it is still quite small.

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The Pai Li and Ya Li pear (First Year)

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The Pai Li and Ya Li pear (First Year)

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Goldenboy may be an improved seedling or bud sport of LeConte.  It is also quite similar to Fan Stil.

Keiffer is known for frequently suffering from very mild strikes of fireblight, particularly in harsh climates.  The tree is never under threat of dying from the disease.  In fact, it is incredibly resilient in this regard, but it will act as a reservoir, thus creating a high pressure area that can negatively effect nearby trees with a higher degree of susceptibility.  Keiffer is, however, not the only offender, but it may be one of the worst. 

Kieffer has had a problem with mislabeling, but I am not sure if this is still a common issue.

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There are possibly two 'LeConte' pears, one of which is supposedly similar to Kieffer and the other similar to Golden Boy and Fan Stil.  The latter appears to be more common.

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Spalding is crunchy like an asian pear.

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