That much internal storage won't really add much to your performance. Higher RAM will certainly contribute to better performance, but not necessarily internal storage. Where it might help is if you habitually bump up against your storage limit (which would cause low storage warnings), but you'd have to be storing a lot of stuff if that was happening on a 64 GB phone.
I'm not sure if it'll make the phone actually lag--but you'll keep getting low memory warnings. If you tend to store a lot on Internal Storage, and also install lots of large apps, then by all means, get a phone with as much internal storage as you can afford.
No its just my other white Edge got water damage and when I called my carrier they didn't have any white edges the only one they had was the black edge in 128gb which they sent me