In theory no, but there can be dozens of reasons why it does. In a perfect world each station exists in it's own little bubble unaffected by anything else, but in the real world little things can have big effects. First, it's possible that with the better antenna, a close station is overloading the tuner frontend, which can de tune or distort the signal coming in for a more desired station. It's all analog electronic tuned for weak signals so a strong one can overload it and cause distortion on the signal you do want which makes it less pleasant.
It's also possible that the tuner is compensating by turning down the input gain making the desired station weaker and disabling things like stereo and enhanced dynamic range because it's a weaker station.
You might want to try some a/b comparisons to make sure.