These kinds of posts are always a little tricky. It's impossible for us to guess how well they will do in the show ring as that will depend on the quality of the other lambs there as well as the personal preferences of the judge that day. With this said, I will tell you what I like and what I would change about each lamb based on the pictures provided.
The first lamb is long, level hipped and appears big boned. I would like to balance this lamb up: it is deep fronted and shallow in the rear flank, opposite what a show lamb should be. It also appears to be flat sided and lacking in lower leg muscle.
The second lamb also appears to be long and level and looks to have more thickness than the first. It also balances better in depth of chest floor and rear flank. As a negative, it is round shouldered and short necked. positioning yourself more in front of the lamb when you brace can help conceal the coarse shoulder and holding the head under the jaw and lifting up can help to extend the neck a little more.