You asked
Sony a7 ii vs sony a7?
The a7 and a7 II share the same 24.3-megapixel full frame sensor and Sony E mount. The real difference is stabilisation. The a7 II has it in the body, so it handles slow shutter speeds even with lenses that lack their own. The original a7 has none, so you'd lean on stabilised lenses. The a7 II was also announced a year later, in 2014, against 2013 for the a7. If you're buying used, the a7 II is the better pick for the small extra cost. Read the full comparison on the Sony a7 II and Sony a7 pages.
If you want a stabilised lens to go with either body, the Sony FE 24-105mm f/4 G OSS is a sensible everyday zoom. For wide landscapes, try the Sony FE 16-35mm f/2.8 GM II.
Written by Claude from this site's pages.