Thought I would give a 1 year update in case someone else ends up looking for similar info. I ordered 5 trees from treesofantiquity.com on M111 rootstock. Kingston Black, Newtown Pippin, Pink Lady, Wickson, and Niedzwetzkyana. Each was cut to under 4'. I put in a drip that broke mid summer and stopped watering for about 6 days. This summer was especially brutal, with prolonged 100s, without much evening cooling.
The Kingston Black broke bud in mid Spring, a month after the rest. The Kingston and Pink Lady leaf curled pretty bad once it got 100F every day, but kept growing and putting out new leaves. The Newtown Pippin was less curled, but when the watering broke it was the hardest hit. Some leaf drop, but eventually started branch and leaf growth again. All of these 3 are about 6.5'. The Wickson had some light leaf curl, no noticable decline during drought, and has the most vigorous growth, reaching about 8' so far with several long, strong branches. It has had a few blossoms and I found two tiny apples in Spring that were cut off.
The Niedz has been awkward. It broke bud in February with a few flowers and tufts of reddish leaves. Lots of new leaves all summer, but no branch growth until mid summer. No leaf curl or drop at any point. It puts out a flower or two at a time every few weeks through Sept. I've pinched off a couple apples. It's all of 4.5' tall now.