LOGITECH G604 vs G502 wireless what's the difference ?

[2013]

LOGITECH G604 vs G502 wireless what's the difference ?

G502 and G604 both look similar to the g602 I have
and the spec is similar just the price

 

[clone]

I have the g502 mouse and the battery is amazing it can last way over a week with me doing quite a bit of gaming each day, as for the feel of it I have small hands and it works well and is comfortable, I don't use the weights but they are there if needed.

 

[luttis]

There's a new g502 supposed to be around 69g (nice) coming soon. Been some leaks on reddit like the g303 shroud had but logi had the images removed so looking legit.