No, there are big differences between some of them.
I have found that Merino is good for low intensity activities, especially in winter. It absorbs and holds moisture but manages to feel comfy, up to a point.
The classic Helly Hansen Stripe I find really good for moving moisture during a high intensity activity and is my go to base layer for most conditions. The days of the smelly helly seem to be gone as well.
Capilene, especially the lighter weight ones can be pretty good as well and super comfy.
For me though, what I wear over the top is just as important. At every opportunity I try to shed any sort of waterproof layer, no matter how breathable, preferring to use windproof shells where I can, even it it means getting a little damp from time to time. I gave up trying to stay dry long ago, now I just focus on staying comfortable.