As far as the paper qualification goes, the answer is yes, for the regions you have mentioned. If you wish to carry on in academia then not all PhDs will always be viewed in the same way, try to make sure that your supervisor has an international reputation in his or her field.
There are, of course, a number of 'independent' universities who offer all sorts of degrees. These institutions often band together in 'Independent University Associations', which recognise each others degrees - they are the only ones who do. Anyone with an ounce of sense will be able to spot these a mile off.