Big differnce is by time ribs are sawn to get at the tenders its as fast to have the animal internals completly gone not to mention flipping one over is easier. For me its a toss up niether take me anywhere close to 2 hours to accomplish either way..
I used to cut ribs to get to the loins, but after awhile I just started to reach in with a small knife and could cut them out. It's tricky if you don't know what you're doing, but practice makes it easier.
I got tired of dealing with the gut sack. Even if gutless wasn't faster i'd probably still do it.
If you're lucky enough to be on private land and can leave your stand up during the off season you can tie an old piece of cloth or something of the sort to your stand. I like to use an old camo bandana that I have. That way the deer get used to the movement and eventually don't bother even looking up when there is slight movement. This may just give you the time to draw your bow or raise your gun without being detected.