In Holland, Tabac is more widely available than Speick so I would guess it's the more popular of the two. Can't speak for other countries.
+1 I can get TABAC sticks in at least 5 or 6 drugstores within a 10 min. walking distance from my home but have to find my first SPEICK stick yet.
FYI, Speick products are available at De Natuurwinkel.
I'm in the UK and I've never seen Speick. Come to that, I've never seen Tabac soap or cream in the shops either, though I did buy a selection last time I was in Amsterdam!
Our big chemist chain Boots has Tabac products such as the after shave etc but not the cream or soap. Don't know why.
So, until I get some Speick from somewhere, it's the Tabac for me. 'Tis rather good!
Gareth