When comparing Logitech G602 vs Logitech G700, the Slant community recommends Logitech G602 for most people. In the question“What is the best gaming mouse?” Logitech G602 is ranked 15th while Logitech G700 is ranked 40th. The most important reason people chose Logitech G602 is:
Great for palm grip along with a the fantastic logitech software for key mapping and profiles.
Specs
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Pros

Pro Comfortable for palm grip with easy to hit buttons
Great for palm grip along with a the fantastic logitech software for key mapping and profiles.

Pro Great battery life
Good for users that want a wireless mouse without any loss of functionality or need to change the batteries every week

Pro Good optical sensor
Only up to 2500 DPI but it's a great sensor for those that don't need very high DPI.
Pro Can run on single battery for lighter weight
Users can opt to run the device on a single battery to cut down on the weight but this will have an impact on battery life.
Pro Customizable buttons
13 programmable buttons for each of 5 profiles.
Pro Good build quality
The build quality on the Logitech G700 is pretty good, feels very sturdy.
Pro Good for palm and figertip grip
Its ergonomic shape and thumb tray allows the device to be good for pal and fingertip grips.
Pro Hybrid mouse
Works as both a wired and a wireless mouse.
Cons


Con Somewhat heavy
Being that this is a wireless mouse there is the battery weight to contend with. Batteries in the weight of the device is 152 grams, which isn't all that bad considering but still not for users that like a lighter mouse.
The mouse can also be used with a single battery, which is useful for not only reducing weight but also for balancing the mouse. With two batteries the mouse can be a bit slipper on the right side when picking it up as the pinkie and ring fingers don't have as much to grip - but balancing the weight over towards the thumb allows the mice to be more easily picked up as the side buttons allow for a decent place to grip.
Con No wired option
The Logitech G602 does not offer a wired USB option, only wireless.

Con Macro Key Defect
Side buttons are known to register multiple keystrokes occasionally when pressed only once. With bindings such as Ctrl+F4, this naturally has destructive results.

Con Middle mouse button wore out after a year of heavy use
And with no way to open it it's near impossible to fix.

Con Short battery life
Battery life seems to only last a few days before it needs recharged.
Con Somewhat heavy
Due to its wireless functionality the mouse is, with a weight of 147g (5.19oz), much heavier than most wired gaming mice.
Con Unpleasant to the touch
The sides are made of a strange grainy plastic that somehow manages to be both rough to the touch and slippery at the same time.
Con Lift off distance is high
The list off distance on the Logitech G700 is too high.
Con G10 button gets stuck
The Logitech G700 has problems with its G buttons sticking especially the 10.
