that bike doesn't have a red grouppo, it has red front and rear derailleurs, nothing else. In fact, it's got fairly cheap brakes, Sram's cheapest 10s chain and cassette
(in an unusual size for a tri bike
), their cheaper shifters, and a not so great wheelset.
It looks to me like that bike was speced out so their ad could say "RED COMPONENTS" without actually giving you any of the benefit thereof.
I'd say it's about a wash between those 2 bikes
(assuming the other you were talking about is Talon SL
), other than the shimano vs sram drivetrain, everything else looks the same, as you said. Carbon damping vibration is a load, but so is the belief that Red derailleurs shift better than Ultegra
(provided both were installed and adjusted properly
). Even Shimano vs Sram doesn't mean that much, since this isn't a road bike, and the shift pattern is the same.
I doubt anyone in the world, beginner or not, would notice a performance difference between those two
(then again, $100 isn't that much compared to the rest of the bike, and it gets you the most expensive [mechanical] derailleurs ever made, if bling means anything to you
).