Wow, good pair of eyes on you! I knew Bitoo's friend looked familiar...figures!
I think this concept of matchmaking/wedding planners is actually a pretty neat one to base a sitcom/rom-com on, which is why both Rishta and BBB had scope for good storytelling. There were definitely a few similarities in the general plot as well...two contrasting characters coming together, how great a team they make, the heights they reach, and then the split, after which there is realization of what they shared and reconciliation. Barring the obvious class differences, Bitoo was quite like Rohan with his sense of humour, sarcastic one-liners and aversion to commitment...even the way he didn't want to hurt Shruti because she was emotional and 'different' from other girls reminded me of how Rohan had this respect for Isha because of which he had never pursued her like all his other conquests.
Obviously, Rishta was without doubt far, far better because they had the medium of television which allows for time to lay out and develop the story and characters, to discuss and address many issues and facets of society, etc....the plot was much more tighter and well thought out as well whereas BBB lacked that clarity in the second half of the movie. Still, it was surprisingly good.
Makes me miss Rishta.
*shakes fist at Sony and YRF*