要想了解集体商标和证明商标的差异，先来了解一下二者的定义。

《中华人民共和国商标法》第三条第二款和第三款规定：

“本法所称集体商标，是指以团体、协会或者其他组织名义注册，供该组织成员在商事活动中使用，以表明使用者在该组织中的成员资格的标志。

本法所称证明商标，是指由对某种商品或者服务具有监督能力的组织所控制，而由该组织以外的单位或者个人使用于其商品或者服务，用以证明该商品或者服务的原产地、原料、制造方法、质量或者其他特定品质的标志。”

至于二者的差异，可以参考以下内容：

Certification marks differ from collective trade marks. The main difference is that collective trade marks may be used by particular members of the organization which owns them, while certification marks are the only evidence of the existence of follow-up agreements between manufacturers and nationally accredited testing and certification organisations. Certification organizations charge for the use of their labels and are thus always aware of exact production numbers. In this way, certification organisations can be seen to earn a commission from sales of products under their follow-up regimes. In return, the use of the certification marks enables the product sales in the first place.

大致意思是，集体商标和证明商标的主要差异在于，集体商标可由拥有商标的组织中的成员使用，而证明商标仅仅是证明制造商与国家认证的测试与认证组织之间存在后续协议。若制造商想要使用证明商标，需要向认证组织缴纳费用。

集体商标的示例包括：

the "CA" device used by the Institute of Chartered Accountants;

the mark "CPA", used to indicate members of the Society of Certified Public Accountants; and,

the marks of various confederated lobby groups.

证明商标的示例包括：

The CE mark meaning "European Conformity", formerly EC mark is a mandatory conformity mark for products placed on the market in the European Economic Area (EEA). With the CE marking on a product the manufacturer ensures that the product conforms with the essential requirements of the applicable EC directives.

The FCC Declaration of Conformity is a mandatory conformity mark for electronic equipment manufactured or sold in the United States. This marking certifies that the product meets standards of the Federal Communications Commission regarding electromagnetic interference.

来源：

Wikipedia Foundation