without the srl - the sb can be hung tighter , thereby extending the distance between the gathers, and flattening the hammock out. this also slightly increases shoulder squeeze, but not to a point of any noticeable discomfort, rather the opposite for me, in it provides support along my back when side-sleeping.
thats why i like the tttg sb style - the bugnet is not tethered to a given distance- letting you flatten out or sag the hammock as much as you want.
the lay is about as flat as you can get- and the 'ridge' is drastically reduced the tighter you hang the hammock.
imo- the next best option is a simple gathered end and separate bug net- if the noseeum is critical.