The iPhone 6 is not bigger then other iPhones, the iPhone 6 Plus is. I have never used any Apple products (for more then a couple of minutes) and I can’t help here.
Please note, their is rumor that the iPhone 6 (Plus?) can bend in the middle while in your pocket. I saw a video and it really can bend just by applying hand pressure! (And he tried bending it back and the screen cracked. So if your phone starts bending, don’t try bending it back!) He tested out a Galaxy Note and it did not bend at all.
Before switching phones, do some research. Check out online reviews and ask people who actually own the phone.
Hatzlacha!