A few weeks ago I got a nice white box from Acushnet that contains 2 white sleeves of balls.   One sleeve just had Titleist #3 and the other one just had Titleist #4, both in black.  No lines, nothing.  Just Titleist and number.  I've tested them both and I absolutely love #4.   
#4 to me, less spin off driver, beautiful around the greens, nice ball flight and SOFT.  Loved everything about it.  I want to compare it to the left dot ProV1 since I was lucky enough to test a few.   Same feeling IMO.  
#3, did not like so much.  Felt firm/hard, spun a lot off driver and just didn't like it.  IMO, felt like I was playing a ProV1x (not the left dash).   
I am looking forward to filling out the survey when it comes out.   Anyone else have a chance to test these?