英国皇家国防联合研究所国防安全研究员施坦·考沙尔博士介绍：“护卫舰和驱逐舰最关键的区别在于大小，再就是功能。”
Size：
驱逐舰一般要比护卫舰更大，但也不是绝对。
Frigates these days weigh anything from 2000 - 5000 tons,
Destroyers are in the range of 5000 – 8000.
护卫舰的吨位一般是2000-5000吨
驱逐舰为5000-8000吨。
There are many exceptions to this general rule
with some frigates larger than some destroyers.
但这不是绝对，有的护卫舰要比驱逐舰还大。
Speed：
Frigates are generally slower than destroyers
