You will find more participants in workshops as there is possibility of some practical session or demonstration session and the workshops are organized for training junior and middle teaching faculty members.
In conferences you need senior persons to join and very senior persons to address the technical sessions. There are chances that senior persons may not be in a position to attend/address though confirmed in advance.
I believe a conference is better, mainly because it has its proceedings. In addition, conference papers can be published it they meet required conditions.
Conferences and workshops are both good and are means of learning from peers. Specifically, workshops provide training and hands-on practical in some cases with the intention to know and be able to practice and implement the same, meanwhile conferences most often present theoretical knowledge and concept that could be applied later.
It depends on what is to be attained. Workshops furnish us with new skills in our line of work while conferences assist us in enjoying rich discussions on new paradigms of research in our academic fields that direct our future research activities.
You will find more participants in workshops as there is possibility of some practical session or demonstration session and the workshops are organized for training junior and middle teaching faculty members.
In conferences you need senior persons to join and very senior persons to address the technical sessions. There are chances that senior persons may not be in a position to attend/address though confirmed in advance.
Both have benefits. Workshops are more practically oriented, conferences - more theoretically. Sometimes, it depends on the topic and participants and usually participation fees are different.
I had participated in conferences that looks like workshops and vice versa. Organizers and moderators also play an important role in such forums.
Here I agree with @Mahfuz Judeh that nowadays conference papers meet certain requirements (sometimes double blinded peer-review) only to be published in conference proceedings.
From this point of view I prefer conferences, but I will not refuse participation in well organized workshops.
Definitely a Workshop will attract more participants than a conference
As workshops have scope for different level of participation from that of college student/ research scholar/ academicians/ professional units/ organizations....