That used to be true for the old forms (pre-December 2016), but the new forms (after 16th December 2016) are the same for both.
The way you apply for inland vs outland is determined by how you answer
Q4 on
IMM5533 (Document Checklist).
Box 1 is for INLAND sponsorship
Box 2 is for OUTLAND (actually living outside Canada)
Box 3 is for OUTLAND (but living in Canada)
Note that WHERE you send the pack is different for Box 1 (Inland) to the address for boxes 2 and 3 (Outland). Although confusingly, it is the same address for both inland and outland if you use a courier!
PS - hands up anyone who knows what 'convoked' means without googling it
Thank you for this detailed reply! I will be selecting box #2