The Topeak top-plate may be useful if your bike lacks fenders. With fenders it is superfluous and merely gets in the way of lashing down oversized loads. For everyday use, this may include multi-packs of toilet roll rather than tents and sleeping bags.
The Topeak sliding rails for their MTX mounting system are propietry. They stick up and can press into soft items.
Tubus top-plate is clean, open and usable with any style of lashing-on you like.

Both rear light brackets are usable and once installed, it makes little difference which one you have.

I use a cheap copy of a Blackburn on my utility bike and it handles everything I throw at it and has lasted many years.