Couple of things to remember:
First, Wink, when he went from KRLA to KFWB in 1962, was a bona fide Top 40 jock, having come to town from WHBQ in Memphis. He could do MOR, as he proved when he got stuck for a year or two at KHJ (which thought it was going Top 40 when they hired him in 1959) , and as he later proved at KGIL and KMPC, but he was absolutely a Top 40 jock (as were Robert W. Morgan and Gary Owens, who also later ended up at KMPC).
Secondly, is it "bridging a gap" if there's no effect?
Wink moved over before KRLA was a factor...it was a step up for him. Jimmy O'Neill and Sam got shoved into overnights and/or weekends upon landing at KFWB and it was only in his final few months there that Sam landed middays (which is not a shift to put your high-profile teen jock in). Jimmy had to leave KFWB for a while and come back before being given afternoons, which just put him up against Dave Hull and The Real Don Steele.
And while all that was going on, KRLA was building arguably the best Top 40 lineup for the era anyone not named Bill Drake could imagine---Emperor Bob Hudson, Casey Kasem, Dave Hull, Dick Biondi, Bob Eubanks. Those are the guys KFWB should have lured across the street, or beaten KRLA to bringing to Los Angeles in the first place.