Used both and both are brilliant smooth reels. The Calais is the better of the two but have no problems with the chronarch but I do prefer the SF series with the wiffle spool (drilled full of holes). I own a Japanese version called a Scorpion Metainium XT, basically its a maroon coloured Chronarch SF100. Its my main Barra reel and I have it spooled with 30lb bionic braid and have never had a problem, I'll be looking at buying another soon, if I had the money though I'd get the Calais but at this stage its the XT.
Cheers, Clutter