What is the difference between these resistors?
Aside from different resistor values, these resistors probably have different power ratings.  The images don't have clear scales, but it can be inferred.  Resistors in Fig.1 are rated for 0.25W.  Resistors in Fig.2 look larger and are probably rated for more power dissipation: 0.5W or 1W.

update: I wrote a brief beginner's field recognition guide for power ratings of common throughole resistors.