clone a database with cold backup

 hi guys,

a quick check, i will be cloning a database with a set of cold backup files.

The cold backup was taken from a noarchivelog mode database

my question:

when my controlfile is already created, is it ok to use either alter database open resetlogs; 

or alter database open ?

my clone db will be in noarchivelog mode. so my guess it should just be alter database open . so that i can save my time in changing my db from archivelog mode to noarchivelog mode.

please further confirm. tks.