Wouldn't make a difference if you bought Ultra or not. Top handle saws are warrantied for 3 months regardless who buys it. Shouldn't have to worry about major defects, but if you get one past 3 months, it'd be interesting to see how they handle it out of their pocket.
here's a link to the stihl limited warranty:
http://www.stihlusa.com/WebContent/CMSFileLibrary/downloads/Limited-Warranty-Policy-2014.pdf
could you review it and show me where there is an exception for "Top handle saws are warrantied for 3 months regardless who buys it?" Not that I put much value on warranties, and my eyes are shot, but I don't see anything about top handle saws mentioned.