Which Mouse do you think?

Razer Breaks. Fast.

Get Logitech, if you're right handed get any of the models, if left handed get the G300, it feels small at first but it's great after 2 days.

both are shit for that price...get logitech or steelseries

I don''t know about those mouses, and this is a wired mouse, so yah. logitech mx518. Ive used it for awhile now, and its a really good mouse.
This is what it looks like

i always play with a 9euro mouse, dont get why people think an expensive mouse makes them better players.

I would recommend not using wireless. It may not be very noticeable, but wired mice respond quicker and generally last longer. If you do want wireless, though, the two you picked out both look good to me. I've heard good things about the Razer Mamba. Not particularly familiar with Gigabyte mice, but their brand is trusted and well known.

Clearly razer between those two.

Well I prefer this one
Clicky

I also had that problem with MX Revolution but it seemed to be the energy receptor in the mouse that was not receiving the energy.
Now I'm using a Razer Naga.

http://www.x7.cn/en/product.asp?id=47
I use this one and I have to say it's good.

Mamba. I have it for about 1.5+years and i havent had any problem with it :)

If you have to pick from those 2 , get razer i guess. I personally use Roccat Kone (1st version) for 6 years now , had minor problems but it's best mouse i've ever had.

I'm thinking about Mickey.

Razer got the best Mouses,Keyboards,Headsets and laptops

I have Logitech G700, nice mouse to fit my hand.

But BS quality, 3 broken button after 2 month.

I need send letter to that company about that.

You must buy some cheap mouse, all expensive mouse BS quality, at least you not
be cry about you lost money.

Go on aliexpress.com
And found some gear.

I have a Steelseries Sensei and am really happy with it. Simple ambidextrous design and is very comfortable, at least in my hand. May be a bit overkill if you don't need all of the macro programming stuff.