Thanks for all the replies. I too had wondered about the similarity between the two machines. No one in Calgary seems to have the Tiara, so it isn't in the running. Right now I am leaning towards the Husqvarna as the price is less than what I have been quoted for the SS and they are throwing in the TruSitich as well. I visited the TruStitch site and they say they sell to both Husqvarna and SS, which tells me the software inside has to be pretty much the same. Fortunately, I have a sewing machine mechanic for a hustband so don't worry too much about that kind of support, and as I once had a Husqvarna dealership and know the dealer where I would buy the machine, I am leaning that direction.
I will be back in Canada in two weeks and make the final decision then. I will keep the list posted.