I just bought and assembled the Obutto. I saw a Playseat on Craigslist in my area, but after looking on here, I felt the Obutto suited me better: no center bar, much better seat, adjustable seat and comes with shift mount(both of which cost extra with Playseat), also a keyboard tray and monitor mount(both of which I don't need, but have if I change my setup in the future like moving to another room).
As far as modifying to quick turn screws, I wouldn't bother. There are only (4) screws/nuts attaching the seat portion of the frame to the wheel/pedals portion of the frame. The lower (2) fasteners are right at the floor level which wouldn't allow for a big knob. Just have a dedicated allen key and socket and you can split the unit into 2 pieces in 3-5 minutes. Very easy.
The advantage I see to the Playseat vs Obutto is shipping cost. You can get the Playseat on Amazon or maybe other sites with free shipping. The Obutto charges $110 shipping to I think anywhere. I just happen to live in the Seattle area, which is where they ship from, so I was able to pick mine up at will-call(which they still charge $25 to do so) and I also got dinged with sales tax.
I also ordered a wheelstandpro which will be here on Tuesday, but I decided I wanted a cockpit more and found a way to arrange my room to have one. So, I will be refusing shipment and paying a restocking fee. If you are wanting a quick storable solution, this might be better from a wifes point of view! I don't have to deal with that.