I've never ridden a dressage saddle. My DownUnder saddle feels to my butt like my Bates AP saddle does, only with bigger flaps. I wouldn't call it a close contact saddle!
I love the poleys, probably because my mare used to spook really bad. I couldn't count the times she did a 180 or 360 with no warning, and the poleys kept my hips aligned with the saddle, and thus my butt IN the saddle. She hasn't done a 'turn & burn' in a long time, but she did try to race another horse some months back. Getting her to stop had my thighs braced against the poleys as I brute forced her to a stop. I'm not a real small guy, but she isn't a real small horse, either!
I don't hit the poleys posting, but I'm a fan of a very discrete post. I tell folks my goal is for my crotch to clear the saddle, while my jeans stay in contact.
If someone could figure out how to put poleys on my Bates jump saddle, I'd think I'd died and gone to heaven. Until then...I guess a lot comes down to what you are used to, and what you want. I love Australian saddles, but my wife & daughter won't touch them. For arena riding, I sometimes do bring out my Bates:
But the DownUnder will probably remain my go-to saddle: