But I think that's only looking at it organizationally. Fundamentally, I think Sunni Islam looks more like Orthodox Judaism than it does Southern Baptism, with many of the same differences.
The organizational matters reflect much deeper spiritual similarities. Please consider the following simplified discussion:
Me: I want to become a believer.
Sunni Islam: Pick up a Koran read it, and do what it says. Classes are preferred, but they are really optional.
Southern Baptist: Great, get a bible, read it, and do what it says. Of course, we have classes for new believers. But... they are optional in the end.
Orthodox Judaism: Real Judaism must, absolutely must, be taught through a teacher.
Me: Ok, I have done that. Do I need to study anything while being a believer?
Sunni Islam: No, not really, the other things such as the Hadith are optional. Koran is all you really need.
Southern Baptist: Just the Bible. Some may read the writings of the early church fathers, but you don't need to
Orthodox Judaism: Judaism must be practiced using both scripture and the collective wisdom of the Jewish teachers.
Me: If I have questions, what should I do?
Sunni: If you want , you can talk to an Imam- but you don't need to. Just read the Koran. Its self explanatory to a genuine believer.
Baptist: Well, I am a pastor. I can answer questions. But, using me is optional. Read the Bible. God will reveal it ti you. Its all you really need.
Orthodox Judaism: You will have questions. And no, you cannot just read the Torah and figure it out. You must be taught by a Rabbi or other authorized teacher.