I couldn't find any major difference but here are some which I can share with you . . .
1. LSBF required minimum 50% of fees in advance for LOA where as Stoufville ask for fee after your acceptance of Visa
2. LSBF have some good packages regarding fees as compare to Stoufville
3. Here in Karachi my representative have rights to hold my Bank Draft of fees if in case of rejection he will return me that with some deduction, you can send LSBF your bank draft but incase of rejection it will take time to return you back how long don't know.....
Just give your best info to the VO .. I got rejected on some non sense issue . . sometimes they do which is really hard to accept
read this link will help you alot
http://www.canadavisa.com/canada-immigration-discussion-board/main-reasons-of-refusal-of-study-permit-for-pakistani-students-t75825.0.html
2nd read mine rejection as well
http://www.canadavisa.com/canada-immigration-discussion-board/study-permit-refused-need-help-t80106.0.html
right now i email VO to overlook it if he satisfied or have any option he will reply me else I ask LSBF to send me fresh LOA for January intake and I apply than within this week . . .
that is the most lame excuse ever given by after Travel History
I know recently 4 to 5 students who have the same VOA but the got Medical Call
Proof of English proficiency (if you are a non-native English speaker) IELTS 5.5 or equivalent.
but now they required ielts to strengthen your case for visa . . getting that score is easy
LSBF canada i haven't find yet but in recent intake Aug some students are applied and waiting for visa now ...
LSBF UK I have some friends studying there ...