If given the option, I'm going to pick Yoforia all day everyday, but my better half likes the plethora of candy/less-than-healthy options that TCBY offers -so from time to time I will cave and agree to pass up Yoforia (my love) for its lesser, more established cousin... TCBY.
TCBY is definitely trying to compete with the boutique Greek yogurt shops, but seems to be having an identity crisis... unsure if it wants to fully transition to a Pink Berry lookalike or stay true to it's yogurt and candied past. The high school kids who work there are always chipper and the place is always bright and clean.
Either way, it's not my fave, but I'll keep going back from time to time because my significant other finds it enjoyable.