There are a lot of manufacturers for plastic 1/72 scale figures.
Plastic soldier review is an excellent site
link.
This site can be looked at by timeline or manufacturer.
Each review gives scores out of ten for accuracy, poses, quality of moulding etc.
The reviews even let you know the type of plastic and the average size of the figures.
1/72 figures can range from 20mm in height to 25mm. That's nearly 1/4" difference.
This can give a good idea as to what you get if you fork out for a box of figures.
Some companies rebadge boxes from others so in the listings you may see a set
listed but it will tell you to look at the set from another mob as they are the same.
There is nothing worse than buying a set of each from two different companies and
finding they are the same one.