Lots of differences...
2 core vs 4 core,
Touch ID vs Touch ID/TouchBar
UHD Graphics 617 vs iris 645
400 nits vs 500 nits brightness
Standard sRGB color vs Wide color (P3) display
12hr battery vs 10hr web wifi
Stereo speakers vs stereo speakers with high dynamic range
78/79 keys vs 64/65 keys...difference is the touch bar vs non touch bar
Bluetooth 4.2 vs 5.0