iPhone 7+ is a much better comparison considering the size of the first two devices.
HTC10: 145.9 x 71.9
iPhone7: 138.3 x 67.1 (-7.6, -4.7 vs HTC10)
iPhone7+: 158.2 x 77.9 (+12.7, +6 vs HTC10)
What about the difference between ridiculously bulky and fat and normal size?