Admit it: they're all harmful. I usually work at the computer, and before I got into pipes, I smoked at least 2, on average 3 packs of cigarettes a day.
Now that I've shifted my focus to pipes, I smoke a maximum of 10-15 cigarettes a day. What I've noticed in the transition from cigarettes to pipes is this: you need to be patient.
The nicotine in pipe tobacco is generally higher than in cigarettes. However, its absorption through the tongue, palate, and sinuses is slower. When we feel the need for nicotine, the immediate thought is of a cigarette because it's a standard habit and a very fast satisfier. This is why patience is required. When we load and light a pipe, we quickly forget about cigarettes. And nicotine absorption begins in about 5-10 minutes.
This means not smoking a cigarette for 1-1.5 hours. Maybe even 2 hours. 5 bowls, on average, equates to 7.5 hours. And yes, we can manage not to smoke.
I particularly enjoy having tea with a cigarette after breakfasts (breakfasts in Turkey are long and feature a wide spread). The same goes after dinners. I guess I'll never want to quit these moments, and I'll continue to smoke at these times.
Breaking free from nicotine addiction is a whole different matter. But balancing it this way is better for me than smoking 3 packs a day. Also, if I'm going to harm myself, I prefer to do it by smoking a pipe. It's much more enjoyable and relaxing.