Need some input
 

I am looking for some input what do you think is a better gun the G&G M4 Carbine MAX or the G&G M4 CQB-R MAX plz comment

They will be the same exact gun internally besides the inner barrel length
They will look a lil different on the outside

Pick the one you think looks better....

Yes, it would be personal preference. Those would be the same internally, minus the inner barrel length. Everything else is just looks.

but the G&G M4 CQB-R MAX has blow back and the other one does not just really wondering if it would make that much of a difference

More important than the EBB (which probably looks cool) is the battery placement. The Carbine looks to be front wired, and the CQB-R rear wired. Some people find they prefer the battery in the butt stock to balance the gun.