Ive heard that they use the same sensor?!

But on my DA 3.5G if I make a 360 turn the mouse is at the same spot.
On my Abyssus same 360 turn and the mouse always ends more up, maybe 5-10cm from original spot.

It feels like DA is more 'precise' or 'smooth' in my hand but not entirely sure if I'm just imagining things.

In past I have switched between the 2 mice, but lately I have been playing with just the Abyssus
I have toyed with sensitivity & found out that about 65cm/360 is best for me atm and my CS:GO skills have improved alot recently (better aim, frag and HS).

So is the Abyssus inferior to the DA 3.5G mouse?

I'm also looking at Logitech G9x as I think it being shorter and wider might be better for my hand, but it has laser which is not good for fps to my understanding?