Let $(\hat{W}, \hat{\omega})$ be symplectic manifold with cylindrical ends.(Completion of symplectic cobordism) Given a almost complex structure $J$, let $u$ be a $J$-holomorphic curve with finite energy.
I always confuse the following two terminologies:
$u$ is $m$-copies of simple holomorphic cylinders.
$u$ is unbranched cover of a simple holomorphic cylinder.
Are these two concepts the same? If not, what is the different?