This is common. Yes, there are several different grades of trunk weatherstrip. Some are made from a denser foam than original, and are hard to compress, resulting in the issue you describe.
I cannot speak on the OER brand of weatherstrip specifically.
Look for a reproduction that has the moulded lip on the sides and rear, and no lip where it glues on the tail panel. This is how the OEM weatherstrip was, and is one sign of a better quality weatherstrip.
Your weather strip will compress over time, and if it is only making the trunk lid sit up 1/16", then it most likely will settle and be OK.
I have seen some where they are so dense, that you cannot even close the trunk lid, so yours doesn't sound that extreme.
I will second the DMT recommendation. They sell excellent quality pieces
Last edited by demon; 08/16/22 06:12 PM.