I found Storm's Xtra Shine to do the best job on these urethanes.
RevLefty, try them without a high gloss shine. The Desperado does not seem to need as much shine as the Hype to get good length. Hopefully you didn't drill either of them too strong.
FYO don't forget that shine on urethane acts VERY differently from shine on resin: it gets more length and reduces the backend, even with "plain" polish. You don't need to use a polish with a slip agent to reduce the hook and backend on a urethane ball.
I had to work very hard get a smooth finish on a Hype. Xtra Shine worked better than Bean's on it, I think because it is real, old time urethane, not a newer version like the Natural. What took me time and several polishes and lots of hard work on the Hype and it only got to where the Desperado came out of the box.
--------------------
"None are so blind as those who will not see."