The second one does not look too good. The brown patches on the trunk probably indicate some dead bark and underlying tissue I think. I don't know what has caused it but I would be pretty confident that is what is causing the problems with growth up top.
The potting mix looks pretty dry in that picture. Most trees are using a lot of water at the moment as they grow and develop new leaves so I actually water mine a bit more through spring to make up for the extra they need as well as the longer, drier days.