ID a type of pear, please

I've had a pear tree in my garden for the last 10 years. I've always thought it was a Williams bon Chretien pear. Recently, a friend said she thought it was a Comice ! I did some research and, frankly, it could conceivably be a Comice, Baldwin, Pineapple among others. I've just picked them (mid October) - flesh is quite firm. So, could anyone help positively identify what it actually is ???

While on the subject of this pear tree it seems to suffer from something which I thought known as "peach leaf curl" but info on the web seems to say that it is only found on peaches, nectarines and almonds. It happens most years and early in the growing season leaves go black and curl up. Any ideas what it is and how to treat it ??

 

The leaf curl could be aphids.
They invade the underside of the leaves and cause the leaves to curl backwards.
As to variety, I wouldn't like to guess.

 

Well, it looks like it's a toss-up between Williams and Comice. Either way they are tasty pears.

Re the leaf curl I mentioned, maybe it is something called Fireblight which is a fungal infection ?? Anyone know a sure-fire way to eradicate fungal infections ??

 

Clue to diseased pear tree ???? Below are photos of the diseased leaves mentioned above. Any clue as to what it is ???