The 7D MkII is a very worthy successor. It is faster (frames per second and shutter speed) and has a weather sealed light alloy body. It has many more focus points (65 vs 9) and has lower noise at high ISO.
I understand the 700D has a tilting touchscreen - the 7D MkII does not, which may be a disadvantage when shooting macro.
Since both cameras have an EF mount and an APS-C sensor, you can continue to use all EF and EFS lenses.