With using either one you need a good fitting coil,with no air bypass.
So if the coil fits like it should, you shouldn't see any difference.
A cased coil is the same as a plenimum and coil. I think you mean ALLSTYLE.
Go to their website and look at the difference between cased and uncased.
Airflow is everything..well mostly. I've not used that brand, so other will advise [usually] as to their long life or not..