I am about to purchase motorized curtain tracks and blinds. I have had a number of quotes but the best motors I can see are either Somfy or Birk. I have read a number of threads here about control of these motors and I was wondering if people had experience between the two Brands. I would like both options position control just by holding a button on until desired position is reached or Bell press for fully open/closed. Which Motor is the better option?