It's certainly not worth it to go from S7 Edge to S8 unless you really really prefer the S8 for some reason and it doesn't cost anything. Also, if you're looking for a new phone, either one would be a great choice depending on what you're looking for. Personally, I think the screen aspect ratio on the S8 isn't so great. It's slightly larger than the S7 Edge by a hair in total screen area, but I prefer the width of the S7 Edge screen. I also prefer the front fingerprint scanner. If you like a rear fingerprint scanner then go with the S8. The face recognition on the S8 isn't as secure, but in most lighting conditions it's more convenient because you can press the bottom of the screen or the power button and within a second the phone is unlocked. You don't have to try to avoid putting your finger on the camera lens. I haven't been able to get the iris scanner to work so it's like it doesn't even exist for me. All in all, they are almost identical phones with the S8 having a slightly superior front camera, but the S7 Edge has a more pleasing screen aspect ratio and more convenient fingerprint scanner (IMO). The main camera is awesome on both. Probably the best digital camera, period, that I've ever personally owned. Anyway, both are overall great phones, but if you have an S7 Edge, keep it. Not worth the "upgrade."