The stretchy boots are ok to use but you still need to separate the bottom ball joint to fit.
I fit a sticky boot on each side without problem, used for P+P fording, laning and the usual V6 tarmac performance.
One side developed a pin hole after about 10k, not an issue but now changed for stretchy, left the other side.
10k from a sticky boot exceeded my expectations by about 9.75k
Will I use sticky boots again..., yes I have one on the shelf waiting....
I don't like fighting to remove the bottom BJ so for a pain free repair the sticky wins, but thay will not last long.
also if you get the slightest oil contamination on the boot when gluing thay will split very quick in deed, if that happens then you have just waisted your time as the extra time to re do negates the quick aspect and you may as well fit a stretchy boot