I had a 2009 street glide loved it until my wife started to ride with me again I was going to add speakers to the saddle bag lids so she could hear the radio I put progressive 944's on it and it still was a sow's ear not a silk purse they don't call them ultras for nothing
As much as I like the looks of these things without the tour pack I use mine literally every day.If you plan on commuting or traveling, especially with a passenger get the Ultra.You never said what year the Ultra was.
Best bet is a test drive.
I bought my sgs because when I drove an ultra it was heavier feeling getting it off the stand. The sgs feels lighter and more agile around the twisties. However I really have not ridden an ultra 'cept on a demo. Having 700 miles on my '14 sgs I am real happy with her. Especially the handling. either way you will be happy most likely.
ferd
rode today defiantly like the ultra, the stock SG setup feels like im on a mini bike, knees in my chest and elbows in my ribs. i can fix that with mods but the 11 ultra classic already fits. it is way better on wifes back and i dont have music on my i phone i still listen to cds