生动 vivid 形象 accurate those 2 words have so similar meanings that we Chinese people always use them together as a single word（生动形象）. 这段话很生动 这段话很形象 这段话生动形象 those 3 sentences are all absolutely right.

意思上没什么区别。我们总是把生动和形象一起说，生动形象是比喻句式的特点，形容描绘或表达的十分具体生动形象。

生动是打动人，形象是描写得很符合事实。