A head of lettuce also cannot feel or suffer. It's intuitive common sense that killing a cow or a chicken or a cat or a dog is a far different thing from pulling a carrot from the ground. Saying "it's killing something no matter what" is rationalizing against something that we all know at the core of our beings.
ANyways, back on plants feeling and suffering. It is easy for you to say that because you are using human dictionary definitions of feeling and suffering, along with all the emotional connotations that go along with those words. Ill specifically discuss the feeling of pain, as that is the "feeling" that seems to be under attack. We "hurt" when we feel "pain". Pain IS a mechanism to signal to the organism that its life is in danger/being threatened, a mechanism that gives the organism a chance to respond to the threat. That may sound too basic, but really, pain IS that simple: It is a warning, and causes events to stop/prevent/fix whats gone wrong. ALL plants certainly sense their environment, and profoundly react in ways that minimize threats to life/propagation. SO whatever you have chosen to call it, plants certainly posess systems that cause them to experience the FUNCTIONAL EQUIVALENT of what you or I call "pain", or feeling if you will. Now, on that note, Ill agree that my above argument seems a bit like bunk even to me - certainly I do value the cute furries more than the green with stems, but I just hate the attitude that plants are these passive little green things. "Value" is a human concept that we choose to assign to things because of our feelings , it is NOT something inherent to the core of being. It is just NOT that simple imo.
As for the actual topic Id rather eat from a cow than a tissue culture too. Different muscles taste better. Cows raised in different places taste better (I like Alberta beef WAY WAY WAY more than I liked beef in Ontario as a random example). That said, I would eat the meat if it were there, and then decide if I liked it enough to eat it again!