Standard is not sewn in and is a bit more bulky. I prefer sewn in but also prefer a burnsed loop for conversion to single point so I can wear the sling in a vehicle and still use the rifle. You cant use a rifle on your strong side out a strong side window while seated in a vehicle without range of motion or choking issues. Then again, you cant use a seatbelt and sling at the same time and not risk some entanglement. For many people the simple sewn in option is best.
Much prefer QD to all other attachment options. Quieter, easier to use, slimmer attacments, better control of the sling with range limited sockets, etc. BFG push buttons are high quality but not as easy to activate the button as some others due to the tiny button and long throw to activte the button in the recessed body. That makes the burnsed 2 point to 1 point option is a bit more fiddly to use moving from front QD to burnsed QD.
Also keep in mind push button QD are not maintenance free. You need to blow em out and put a drop of CLP once every 6 to 12 months or they will start binding. You only need to clean and lube every 6 months if you use in dusty conditions 12 months otherwise. When you hear a horror story of a QD not holding the lack of maintenance or a low end QD swivel resilting in a stuck ball detent is usually why.
If you go non sewn in and buy your own QD swivel attachments there are some really horrible Chicom versions if you cheap out. BFG, Magpul, and Uncle Mikes are all good to go... everything else has been bad in my experience with BFG and Magpul being better than UM. I prefer Magpul over BFG because they are easier to push the button. BFG has a slimmer 1" option or a standard 1.25" option.