Most of the leverlocks we have here are separate locks just like your Abloy, these are installed maybe 20-30cm above the "everyday lock".
I didn´t even know about 451s etc. but as a keymaker I look more at the keyway/profile than the actual locking mechanism.
The keys of these leverlocks have mirrored cuts on each side of the key so you can use it from both sides of door. Just like Juwel.
About profiles; The older Boda leverlocks have 2 different blanks, the warding can be on either side of the key. 3 different lenghts of both. These fit Abloys like yours too.
Don´t really know about Bodaguard, I think I read somewhere there are 2 keyways. 8 levers, yes, but they can somehow tilt or something...
Sento is way different, its like Exec with a couple of extra grooves. There must be atleast 4 profiles for each.
Didn´t find any good info about Bodaguard, we need a welthy hobbyist to buy one and take it apart.