Does anyone have a favorite wax ring brand?

Are they all the same or do some seem to do a better job?
I purchased a new Ultramax today and am getting ready for delivery and installation.
My guess is that I will have the same lead-wiped flange and that it will be in OK shape but probably a bit lower than floor level.I can't demo/retile yet and will have to make do with what I have for a while.How do I put a flange extension on,just in case I have to use one?
Thanks in advance.
Alan

You can buy a flang extesion kit at your loal big box it should come with
instructions.Make sure to clean the wax off real good use mineral spiritsor
denatured alcahol to get the wax residue off the exsisting flang. Use
slicone to seal extension to exsisting flange. screw to floor.
Good luck.