Welcome to our forum.
Both are sold by reputable dealers not far from us. The prices would be pretty much equal (approx. $13700 before tax and after manufacturer's rebates - we live in CT, so high cost area)
Thank you all for the replies. To the post asking for the name of the dealer for Hot Springs, it was Reliable Pool & Spa in Naugatuck, CT http://www.reliablepools.com/ While we didn't wind up purchasing the tub from them, the dealer was fantastic as far as answering questions, setting up wet tests (we did 2). They have a great reputation for servicing the tubs, too. We wound up going with the Bullfrog, mostly because it was the tub where we didn't float out of the seats - I think the foot dome is what made the difference there. We are expecting delivery the first week of January! Can't wait to try hot tubbing in the middle of this cold winter.